From 4 mangoes, 5 oranges and 6 apples, how many selections of fruits can be made by taking at least one of them ?

From 2 mangoes, 3 oranges and 4 apples, how many selections of fruits can be made by taking : at least one of them?

From 2 mangoes, 3 oranges and 4 apples, how many selections of fruits can be made by taking : at least one of each kind ?

How many selections of 4 books can be made from 8 different-books ?

How many signals can be made by hoisting 5 flags of different colours ?

Out of 7 consonants and 4 vowels, how many words can be made each containing 3 consonants and 2 vowels ?

There are 4 oranges, 5 apples and 6 mangoes in a fruit basket. In how manyways can a person make a selection of fruits from among the fruits in the basket?

A husband and his wife appear for an interview for two parts. The probability of husband's selection is 1/7 and that of wife's selection is 1/5 . What is probability that at least one of them will be selected?

There are 4 oranges, 5 apples and 6 mangoes in a fuit basket (all fruits of same kind are identical). Number of ways in which fruits can be selected from the basket, is

The probability of A and B achieving a target is 3/4 and 5/6 respectively. If both of them try then find the probability that at least one of them will achieve the target

A can solve 90% of the problems given in a book and B can solve only 70% problems. What is the probability that at least one of them will solve the problem selected at random from the book?