X = √15 is the greatest among four.

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Picking up a ball from Bag A = ½ *3/9 . From Bag B = ½*7/9 . (3/18)+(7/18) = 5/9.

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Out of three options, only one is correct, so the probability of selecting the correct option is 13. Also, the probability of selecting the wrong answer is (1 - 13)= 23.

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Let Shreya’s age = x years

Acc to ques, Ram’s age = x+5 years

Ritesh’s age = x+2

Given is Ritesh’s age = 13 years

x+2 = 13;

x = 11 years

Ram’s present age = 11 + 5 = 16 years

Ram’s age after 2 years will be 18 years.

There number of ways of selecting an option from the three given options is 3C1 and there is a total of 6 such questions, so the number of possibilities for all the questions = (3C1)6

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