A box contains 50 balls numbered from 1 to 50 If three balls are drawn at random with replacement Wh...........

Quantitative Aptitude ( CCS) Probability

A box contains 50 balls, numbered from 1 to 50. If three balls are drawn at random with replacement. What is the probability that sum of the numbers are odd?

1/2

1/3

2/7

1/5

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Explanation:

Answer & Explanation
Answer –1/2
Explanation :
There are 25 odd and 25 even numbers from 1 to 50.
Sum will be odd if = odd + odd + odd, odd + even + even, even + odd + even, even+ even + odd
P= (1/2)*(1/2)*(1/2) + (1/2)*(1/2)*(1/2) + (1/2)*(1/2)*(1/2) + (1/2)*(1/2)*(1/2)
=4/8 = 1/2