Rohan's present age is 3/7 times the age of his mother. After four years, he will be one- half of the age of his mother. How old is his mother at present?
Rohan Mother 3 7 After 5 years ATQ- 3x+4 =(7x+4)/2 6x+8=7x+5 X=3 Present age of mother =7×3=21years.
A committee of 5 members is to be formed out of 6 men and 4 women. In how many ways can a committee consisting of atleast 1 woman be formed?
6 students appear in an examination. In how many ways can the result be announced?
In a group of 9 boys and 5 girls, 5 students have to be selected. In how many ways it can be done so that only 2 boys are included.
Find the number of words that can be formed by using all letters of the word 'ESCAPE', if it starts with letter C and end with letter P.
How many words can be formed with the letter of the word ‘NUMBER’ when alll vowels are never together?
A three-letter word is to be formed using the English alphabet where the first letter is a vowel, the second letter is a vowel different from the first,...
How many five digit numbers can be formed using the digits 0, 1, 2, 3, 4 and 5 which are divisible by 5, without repeating the digits?
In how many different ways can the letters of word ‘PUMPKIN’ be arranged?
Which of the following is TRUE for “complementary event or ‘not event’”?
What will be the number of permutations of n different things, taken r at a time, where repeatition is allowed?
