NDA || Mathematics || Algebra || Probability || Quiz 2020

If A and B are two events associated with a random experiment for which P (A) = 0.60, P (A or B) = 0.85 and P (A and B) = 0.42, find P (B).

A dice is rolled. If the outcome is an even number, what is the probability that both it is a number greater than 2?

Praveen speak truth in 75% of cases and Jitu in 80% of cases. In what percent of cases are they likely to contradict each other in narrating the same event?

If there are two children in a family, find the probability that there is at least one boy in the family.

In class, 30% of the students offered mathematics 20% offered chemistry and 10% offered both. If a student is selected at random, find the probability that he has offered mathematics or chemistry.