If 2 cards are drawn at random from a well shuffled pack of 52 playing cards from the same suit, then the probability of getting a face card and a card having a prime number is

A dealer gets refrigerators from 3 different manufacturing companies $C_1, C_2$ and $C_3 .25 \%$ of his stock is from $C_1, 35 \%$ from $C_2$ and $40 \%$ from $C_3$. The percentages of receiving defective refrigerators from $C_1, C_2$ and $C_3$ are $3 \% 2 \%, 1 \%$ respectively. If a refrigerator sold at random is found to be defective by a customer, then the probability that it is from $\mathrm{C}_2$ is

If the probability that a student selected at random from a particular college is good at mathematics is 0.6 , then the probability of having two students who are good at Mathematics in a group of 8 students of that college standing in front of the college, is

If on an average 4 customers visit a shop in an hour, then the probability that more than 2 customers visit the shop in a specific hour is