2 black cards and 2 red cards are lying face down on a table. If you guess their colours, find the probability that you get none of them right

2 black cards and 2 red cards are lying face down on a table. If you guess their colours, find the probability that you get two of them right

2 black cards and 2 red cards are lying face down on a table. If you guess their colours, find the probability that you get all four of them right

A can hit a targe: 4 times out of 5 times, B can hit the target 3 times out of 4 times and C can hit the target 2 times out of 3 times. They fire simultaneously. Find the probability that none of them will hit the target.

A card is selected from 100 cards numbered 1 to 100 cards. If cards is selected at random, find the probability that the number on the card is divisible by 2

A card is selected from 100 cards numbered 1 to 100 cards. If cards is selected at random, find the probability that the number on the card is divisible by both 2 and 5

A card is selected from 100 cards numbered 1 to 100 cards. If cards is selected at random, find the probability that the number on the card is divisible by either 2 or 5

Can you generalize this situation? If a fair coin is tossed six times, find the probability of getting exactly 2 heads.

Let bag A contains 4 black and 6 red balls and bag B contains 7 black and 3 red balls. A die is thrown. If 1 or 2 appears on it, then bag A is chosen, otherwise bag B. If two balls are drawn at random (without replacement) from the selected bag, then find the probability of one of them being red and another black.