Quantitative Aptitude प्रश्न और उत्तर का अभ्यास करें
8प्र: In the following question a number series is given which has only one wrong number. You have to find out the wrong number? 7.5 47.5 87.5 157.5 247.5 357.5 487.5 1554 05b5cc7c9e4d2b41977750e9f
5b5cc7c9e4d2b41977750e9f- 147.5true
- 287.5false
- 3247.5false
- 4357.5false
- उत्तर देखेंउत्तर छिपाएं
- Workspace
- SingleChoice
उत्तर : 1. "47.5"
व्याख्या :
Answer: A) 47.5 Explanation:
प्र: Find the simple interest on Rs.600 for 11 months at 5 paisa per month ? 1550 05b5cc6e3e4d2b4197774ec93
5b5cc6e3e4d2b4197774ec93- 1Rs. 30false
- 2Rs. 3.30true
- 3Rs. 33false
- 4Rs. 330false
- उत्तर देखेंउत्तर छिपाएं
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उत्तर : 2. "Rs. 3.30"
व्याख्या :
Answer: B) Rs. 3.30 Explanation: I = (600x11x5)/100 = 330 Paise = Rs. 3.30
प्र: The length of a rectangular plot is increased by 50%, to keep its area unchanged, the width of the plot should be decreased by ______? 1549 05b5cc6bce4d2b4197774d8ca
5b5cc6bce4d2b4197774d8ca- 129.87%false
- 233.33%true
- 322.22%false
- 419.5%false
- उत्तर देखेंउत्तर छिपाएं
- Workspace
- SingleChoice
उत्तर : 2. "33.33%"
व्याख्या :
Answer: B) 33.33% Explanation: % Decrease in Width = 50150x100 = 33.33%
प्र: In a box, there are 9 blue, 6 white and some black stones. A stone is randomly selected and the probability that the stone is black is ¼. Find the total number of stones in the box? 1549 05b5cc64ae4d2b4197774bc47
5b5cc64ae4d2b4197774bc47- 115false
- 218false
- 320true
- 424false
- उत्तर देखेंउत्तर छिपाएं
- Workspace
- SingleChoice
उत्तर : 3. "20"
व्याख्या :
Answer: C) 20 Explanation: We know that, Total probability = 1 Given probability of black stones = 1/4 => Probability of blue and white stones = 1 - 1/4 = 3/4 But, given blue + white stones = 9 + 6 = 15 Hence, 3/4 ----- 15 1 ----- ? => 15 x 4/3 = 20. Hence, total number of stones in the box = 20.
प्र: In a box, there are four marbles of white color and five marbles of black color. Two marbles are chosen randomly. What is the probability that both are of the same color? 1548 05b5cc6a3e4d2b4197774cc15
5b5cc6a3e4d2b4197774cc15- 12/9false
- 25/9false
- 34/9true
- 40false
- उत्तर देखेंउत्तर छिपाएं
- Workspace
- SingleChoice
उत्तर : 3. "4/9"
व्याख्या :
Answer: C) 4/9 Explanation: Number of white marbles = 4 Number of Black marbles = 5 Total number of marbles = 9 Number of ways, two marbles picked randomly = 9C2 Now, the required probability of picked marbles are to be of same color = 4C2/9C2 + 5C2/9C2 = 1/6 + 5/18 = 4/9.
प्र: Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5 ? 1548 05b5cc764e4d2b4197774fd7b
5b5cc764e4d2b4197774fd7b- 12/3false
- 21/2true
- 37/8false
- 44/5false
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- Workspace
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उत्तर : 2. "1/2"
व्याख्या :
Answer: B) 1/2 Explanation: Multiples of 3 below 20 are 3, 6, 9, 12, 15, 18 Multiples of 5 below 20 are 5, 10, 15, 20 Required number of possibilities = 10Total number of possibilities = 20Required probability = 10/20 = 1/2.
प्र: The difference between circumference and semidiameter of a circle is 37 cm. What is the diameter of the circle ? 1547 05b5cc6c6e4d2b4197774de27
5b5cc6c6e4d2b4197774de27- 118 cmfalse
- 212 cmfalse
- 316 cmfalse
- 414 cmtrue
- उत्तर देखेंउत्तर छिपाएं
- Workspace
- SingleChoice
उत्तर : 4. "14 cm"
व्याख्या :
Answer: D) 14 cm Explanation: circumference of a circle = 2πr => 2 × 22/7 × r – r = 37 => 37/7 × r = 37 => r = 7 cm. Diameter D = 2r = 7×2 = 14 cm.
प्र: In how many different ways can the letters of the word 'THERAPY' be arranged so that the vowels never come together? 1547 05b5cc69de4d2b4197774c919
5b5cc69de4d2b4197774c919- 11440false
- 2720false
- 32250false
- 43600true
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- Workspace
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उत्तर : 4. "3600"
व्याख्या :
Answer: D) 3600 Explanation: Given word is THERAPY. Number of letters in the given word = 7 These 7 letters can be arranged in 7! ways. Number of vowels in the given word = 2 (E, A) The number of ways of arrangement in which vowels come together is 6! x 2! ways Hence, the required number of ways can the letters of the word 'THERAPY' be arranged so that the vowels never come together = 7! - (6! x 2!) ways = 5040 - 1440 = 3600 ways.