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Q #56
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Cognizant Quants Question


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A bag contains 8 white balls and some yellow balls. If the probability of drawing a white ball is twice of a yellow ball, then the number of yellow balls in the bag is:
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let number of yellow ball = x Given Probability(white ball)= 2*Probability(yellow ball) (8/(8+x))=2(x/(x+8)) solve x=4

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Q #57
:

Cognizant Quants Question


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Malini solved the following question in her Mathematics examination: (6/4 + 561 of 3/7)/(5 + 231) And her answer was 38/77. By how much was her answer wrong?
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6/4+(31/6 * 3/7) = 104/28

5 + 7/3 = 22/3

104/28 / 22/3 = 39/77

39/77 - 38/77 = 1/77



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Q #58
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Cognizant Quants Question


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Which number should be multiplied by 5324 to make it a perfect square?
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Prime Factors of 5324 = (22 × 113) or(2 × 2 × 11 × 11 × 11). We should multiple with 2 to make perfect square.

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Q #59
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Cognizant Quants Question


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Ramakant wants to earn Rs. 1,500 interest on his deposits. He plans to buy a sack of grains with the interest. He puts Rs. 5,000 into his account that earns 2.5% interest. How long will he need to leave his money in the account to earn this interest that would help him buy the sack of grains?
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si = 1500 p= 5000 si = p*t*r/100 1500 = 5000*2.5*t/100 12 years

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Q #60
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Cognizant Quants Question


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A manager decides to form a team of 3 employees. In how many ways can he form a team, if he has a total of 10 employees?
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3 employees are selected from 10 =10C3

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