1.

I:In a class 25% of the students failed in Mathematics , 30% failed in Chemistry and 15% failed in both Mathematics and Chemistry . If a student is selected at randomfailed in Mathematics , the probability that he failed in Chemistry is 1//2. II: A bag contains 10 identical balls of which 4 are blue and 6 are red. 3 balls are taken out at random from the bag one after the other. The probability that all the 3 balls drawn are red is 1//6.

Answer»

Only I is true
Only II is true
Both I and II are true
neither I nor II true

Answer :C


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