IIT JEE प्रश्न और उत्तर का अभ्यास करें

प्र: A person starting with 64 rupees and making 6 bets, wins three times and loses three times, the wins and loses occurring in random order. The chance for a win is equal to the chance for a loss. If each wager is for half the money remaining at the time of the bet, then the final result is: 4277 0

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    A gain of Rs. 27
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    A loss of Rs. 37
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    A loss of Rs. 27
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  • 4
    A gain of Rs. 37
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उत्तर : 2. "A loss of Rs. 37"
व्याख्या :

Answer: B) A loss of Rs. 37 Explanation: As the win leads to multiplying the amount by 1.5 and loss leads to multiplying the amount by 0.5, we will multiply the initial amount by 1.5 thrice and by 0.5 thrice (in any order). The overall resultant will remain same. So final amount with the person will be (in all cases): = 64(1.5)(1.5)(1.5)(0.5)(0.5)(0.5)= Rs. 27 Hence the final result is:  64 − 27 = 37 A loss of Rs.37

प्र: Which of the following contributed to the failure of prohibition? 4267 0

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    it was not imposed strictly on immigrants
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    many americans didnt consider drinking to be a crime
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    it adversely affected american productivity
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    organized crime controlled illegal alcohol production
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उत्तर : 4. "organized crime controlled illegal alcohol production"
व्याख्या :

Answer: D) organized crime controlled illegal alcohol production Explanation: Crime connected with illegal alcohol production and sale became a major issue so that even many people who had originally supported Prohibition decided that it needed to be repealed.

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उत्तर : 4. "Rs. 1,00,000"
व्याख्या :

Answer: D) Rs. 1,00,000 Explanation: Deepa invested Rs.50,000 for 12 months, Rs.(50000 + 20000) for 12 months and Rs.(50000 + 20000 + 20000) for 12 months.i.e, she invested Rs.50,000 for 12 months, Rs.70000 for 12 months and Rs.90000 for 12 months.Sushma invested Rs. 70000 for 2 years; i.e, Rs.70000 for 24 monthsAnd, Avanthi invested Rs.70000 for 1 year; i.e, Rs. 70000 for 12 months. Their investing ratio:Deepa : Sushma : Avanthi = (50,000 x 12 + 70000 x 12 + 90000 x 12):(70000 x 24):(70000 x 12)= (25,20,000):(16,80,000):(8,40,000) = 252:168:84 = 3:2:1 Total profit for 3 years = Rs.3,00,000Therefore, Sushma's share = Rs.(3,00,000 x 2 /(3+2+1)) = Rs.(3,00,000 x 2/6) = Rs.1,00,000.

प्र: One reason the skeletal system is important is because 4262 0

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    the skeletal system creates the connective tissue and tendons that allow the body to move
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    the skeletal system is responsible for controlling functions of the entire body
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    without the skeletal system, an individual would not have enough calcium to live
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    the skeletal system is solely responsible for housing the body's immune system
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उत्तर : 1. "the skeletal system creates the connective tissue and tendons that allow the body to move"
व्याख्या :

Answer: A) the skeletal system creates the connective tissue and tendons that allow the body to move Explanation: One reason the skeletal system is important is because the skeletal system creates the connective tissue and tendons that allow the body to move.

प्र: Artist is to painting as senator is to 4259 0

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    politician
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    constituents
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    attorney
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    law
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उत्तर : 4. "law"
व्याख्या :

Answer: D) law Explanation: As we know that an artist makes paintings, similarly, a senator makes laws.   Hence, Artist : Painting :: Senator : Law.

प्र: Ezra cup is associated with which sports? 4255 0

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    Hockey
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    Polo
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    Rowing
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    Football
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उत्तर : 2. "Polo"
व्याख्या :

Answer: B) Polo Explanation: The Ezra Cup is a popular polo tournament conducted annually in India. The Calcutta Polo Club runs this oldest and first ever Polo Trophy. The first Ezra Cup was held in 1880. After a period of inactivity, it has now been revived by Mr. Keshav Bangur, Calcutta Polo Club's president.

प्र: If the selling price of a mat is five times the discount offered and if the percentage of discount is equal to the percentage profit, find the ratio of the discount offered to the cost price. 4254 0

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    6:31
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    11:30
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    7:30
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    31:6
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उत्तर : 3. "7:30"
व्याख्या :

Answer: C) 7:30 Explanation: Since S.P. = 5 (M.P. - S.P.) => 5 M.P. = 6 S.P.M.P. = (6/5) S.P.Since the percentage discount = Percentage profit,65S.P - S.P65S.P×100 = S.P -C.PC.P×100Therefore, 1/6 = (S.P/C.P) – 1 => S.P = (7/6) C.PM.P = 6/5 S.P = 6/5 x 7/6 C.P = 7/5 C.PTherefore, Ratio of discount to C.P= (M.P – S.P)/C.P = [{(7/5)C.P - (7/6)C.P} / C.P.]= 7/30   Therefore, the ratio is 7 : 30

प्र: Vinod have 20 rupees. He bought 1, 2, 5 rupee stamps. They are different in numbers by the reason of no change, the shop keeper gives 3 one rupee stamps. So how many stamps Vinod have ? 4250 0

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    10
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    18
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    12
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    15
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उत्तर : 1. "10"
व्याख्या :

Answer: A) 10 Explanation: Given total rupees = 20 RsNo. of one rupee stamps = 3Now, remaining money = Rs. 17With that he buys only 2 and 5 rupee stampsLet number of Rs. 5 stamps = KLet number of Rs. 2 stamps = L5K + 2L = 17K = 3, L = 1 (possible)L = 6, K = 1 (possible)=> But given that they are different in number so, K is not equal to 3one rupee stamps = 32 two stamps = 65 rupee stamps = 1Total number of stamps = 10.

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