Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें

प्र: 1/8 as a decimal? 1736 0

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    0.125
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  • 2
    0.225
    सही
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  • 3
    0.325
    सही
    गलत
  • 4
    0.425
    सही
    गलत
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उत्तर : 1. "0.125"
व्याख्या :

Answer: A) 0.125 Explanation: 1/8 to convert into decimal, Find an equivalent fraction with a denominator of a power of 10. In this case, we will use 1000. 18 x 125125 = 1251000 This can now be written as a decimal with 3 decimal places (because we have thousandths. i.e, 0.125   Hence, 18 as a decimal = 0.125

प्र: A fair coin is tossed 11 times. What is the probability that only the first two tosses will yield heads ? 1735 0

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    (1/2)^11
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  • 2
    (9)(1/2)
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    (11C2)(1/2)^9
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  • 4
    (1/2)
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उत्तर : 1. "(1/2)^11"
व्याख्या :

Answer: A) (1/2)^11 Explanation: Probability of occurrence of an event,  P(E) = Number of favorable outcomes/Numeber of possible outcomes = n(E)/n(S) ⇒ Probability of getting head in one coin = ½,  ⇒ Probability of not getting head in one coin = 1- ½ = ½,  Hence,  All the 11 tosses are independent of each other. ∴ Required probability of getting only 2 times heads =122×129=1211

प्र: A teacher multiplies 987 by a certain number and obtains 556781 as her answer. If in the answer, both 6 and 7 are wrong but the other digits are correct, then the correct answer will be 1735 0

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    553681
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    555181
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  • 3
    556581
    सही
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  • 4
    555681
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उत्तर : 4. "555681"
व्याख्या :

Answer: D) 555681 Explanation: Given number is 987 = 3 x 7 x 47. So, required number must be divisible by each one of 3, 7, 47. None of the numbers in 553681 and 555181 are divisible by 3. While 556581 is not divisible by 7.Correct answer is 555681.

प्र:

निम्न समीकरण को हल किजिए।

1735 0

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    1512
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  • 2
    1521
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  • 3
    1251
    सही
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  • 4
    1531
    सही
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  • 5
    इनमें से कोई नहीं
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उत्तर : 2. "1521"

प्र: Excluding the stoppages, the speed of a bus is 64 km/hr and including the stoppages the speed o the bus is 48km/hr. For how many minutes does the bus stop per hour? 1734 0

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    12.5 minutes
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  • 2
    15 minutes
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  • 3
    10 minutes
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  • 4
    18 minutes
    सही
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उत्तर : 2. "15 minutes"
व्याख्या :

Answer: B) 15 minutes Explanation:

प्र: Manideep purchases 30kg of barley at the rate of 11.50/kg and 20kg at the rate of 14.25/kg. He mixed the two and sold the mixture in the shop. At what price per kg should he sell the mixture to make 30% profit to him ? 1734 0

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    15.84
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  • 2
    14.92
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  • 3
    13.98
    सही
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  • 4
    16.38
    सही
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उत्तर : 4. "16.38"
व्याख्या :

Answer: D) 16.38 Explanation: Given, Manideep purchases 30kg of barley at the rate of 11.50/kg nad 20kg at the rate of 14.25/kg. Total cost of the mixture of barley = (30 x 11.50) + (20 x 14.25) => Total cost of the mixture = Rs. 630 Total kgs of the mixture = 30 + 20 = 50kg Cost of mixture/kg = 630/50 = 12.6/kg To make 30% of profit => Selling price for manideep = 12.6 + 30% x 12.6 => Selling price for manideep = 12.6 + 3.78 = 16.38/kg.

प्र: Lucky started working 2 years ago. Her starting salary was half of Karthik's salary at that time. Each year since then Lucky and Karthik have received a rise of 10% in their respective salary. What percentage (to the nearest percent) of Karthik's current salary is Lucky's current salary ? 1734 0

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    75%
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  • 2
    22.5%
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  • 3
    35%
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  • 4
    50%
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उत्तर : 4. "50%"
व्याख्या :

Answer: D) 50% Explanation: Let the salary of Karthik 2 years ago be Rs.100So, Lucky's salary 2 years ago was Rs.50   Karthik's present salary has seen two 10 percent increases. So as Lucky's salary. So, Karthik's salary 1 year ago = 100 + 10% of 100 = 100 + 10 = 110.Karthik's present salary = 110 + 10% of 110 = 110 + 11 = 121.   Lucky's salary 1 year ago = 50 + 10% of 50 = 50 + 5 = 55Lucky's present salary = 55 + 10% of 55 = 55 + 5.5 = 60.5   Lucky's present salary of 60.5 = 50% of Karthik's present salary of 121.

प्र: Second & fourth Saturdays and every Sunday is a holiday. How many working days will be there in a month of 31 days beginning on a Friday ? 1732 0

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    24
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  • 2
    23
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  • 3
    22
    सही
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  • 4
    25
    सही
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उत्तर : 1. "24"
व्याख्या :

Answer: A) 24 Explanation: Given that the month begins on a Friday and has 31 days   Sundays = 3rd, 10th, 17th, 24th, 31st=> Total Sundays = 5   Every second & fourth Saturday is holiday. 2nd & 4th Saturday in every month = 2   Total days in the month = 31   Total working days = 31 - (5 + 2) = 24 days.

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