Cpt quant

X can solve 80% of the problems while Y can solve 90% of the problems given in the books of statistics. If the problem selected at random, find the probability that at least one of them will solve the problem?
Replies (3)

0.8 x 0.1 + 0.2 x 0.9 

0.8 x 0.1 + 0.2 x 0.9 = 0.26
 

This is not correct !!!

Ans will be 98% (1 - 0.1*0.2)

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