In this task, you need to provide the correct option for a given problem on probability from the provided options.
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Question: Problem: a box contains 100 balls , numbered from 1 to 100 . if 3 balls are selected at random and with replacement from the box . if the 3 numbers on the balls selected contain two odd and one even . what is the probability z that the first ball picked up is odd numbered ? 
Options: a ) 0 , b ) 1 / 3 , c ) 1 / 2 , d ) 2 / 3 , e ) 1

Answer: d


Question: Problem: if two dice are thrown together , the probability of getting an even prime number on the dice is 
Options: a ) 1 / 36 , b ) 1 / 18 , c ) 1 / 13 , d ) 1 / 9 , e ) 5 / 36

Answer: a


Question: Problem: in how many ways 3 boys and 3 girls can be seated in a row so that boys and girls are alternate ? 
Options: a ) 69 , b ) 70 , c ) 71 , d ) 72 , e ) 73

Answer:
d