A family has two children. What is the probability that both the children are boys given that at least one of them is a boy?

Assume that each born child is equally likely to be a boy or a girl. If a family has two children,what is the conditional probability that both are girls given that atleast one is a girl

Assume that each born child is equally likely to be a boy or a girl. If a family has two children,what is the conditional probability that both are girls given that the youngest is a girl

A coin is tossed twice. What is the probability that at least one tail occurs?

John and Mary appeared in an examination. The probability that John will qualify the examination is 0.05 and that Mary will qualify the examination is 0.10. The probability that both will qualify is 0.02. Find the probability that Atleast one of them will not qualify the examination.

Probability that Ram passsed in mathematics is 2/3 and the probability that he passed in English is 4/9.If the probability of passing in both subject is 1/4,then what is the probability that Ram will pass in atleast one of these subjects?