Maths-
General
Easy

Question

The number of ways in which 20 volunteers can be divided into groups of 4, 7 and 9 persons is-

  1. 16C7× 13C2    
  2. 20C7 × 11C4    
  3. 20C4 × 16C7    
  4. 20C9 × 13C9    

The correct answer is: 20C4 × 16C7

Book A Free Demo

+91

Grade*

Related Questions to study

General
Maths-

The number of ways to make 5 heaps of 3–3 books each from 15 different books a-

The number of ways to make 5 heaps of 3–3 books each from 15 different books a-

Maths-General
General
Maths-

The line among the following that touches the y to the power of 2 end exponent equals 4 a x is

The line among the following that touches the y to the power of 2 end exponent equals 4 a x is

Maths-General
General
Maths-

The number of necklaces which can be formed by selecting 4 beads out of 6 beads of different coloured glasses and 4 beads out of 5 beads of different metal, is-

The number of necklaces which can be formed by selecting 4 beads out of 6 beads of different coloured glasses and 4 beads out of 5 beads of different metal, is-

Maths-General
General
Maths-

The number of ways in which 20 persons can sit on 8 chairs round a circular table is-

The number of ways in which 20 persons can sit on 8 chairs round a circular table is-

Maths-General
General
Maths-

The number of numbers can be formed by taking any 2 digits from digits 6,7,8,9 and 3 digits from 1, 2, 3, 4, 5 is -

The number of numbers can be formed by taking any 2 digits from digits 6,7,8,9 and 3 digits from 1, 2, 3, 4, 5 is -

Maths-General
General
Maths-

How many numbers consisting of 5 digits can be formed in which the digits 3,4 and 7 are used only once and the digit 5 is used twice-

How many numbers consisting of 5 digits can be formed in which the digits 3,4 and 7 are used only once and the digit 5 is used twice-

Maths-General
General
maths-

The number of ways of distributing n prizes among n boys when any of the student does not get all the prizes is-

The number of ways of distributing n prizes among n boys when any of the student does not get all the prizes is-

maths-General
General
Maths-

If the line x plus y plus k equals 0 is a tangent to the parabola x to the power of 2 end exponent equals 4 y then k=

If the line x plus y plus k equals 0 is a tangent to the parabola x to the power of 2 end exponent equals 4 y then k=

Maths-General
General
Maths-

The number of ways in which n prizes can be distributed among n students when each student is eligible to get any number of prizes is-

The number of ways in which n prizes can be distributed among n students when each student is eligible to get any number of prizes is-

Maths-General
General
Maths-

In how many ways can six different rings be wear in four fingers?

In how many ways can six different rings be wear in four fingers?

Maths-General
General
Maths-

How many signals can be given by means of 10 different flags when at a time 4 flags are used, one above the other?

How many signals can be given by means of 10 different flags when at a time 4 flags are used, one above the other?

Maths-General
General
Maths-

The number of ways in which three persons can dress themselves when they have 4 shirts. 5 pants and 6 hats between them, is-

The number of ways in which three persons can dress themselves when they have 4 shirts. 5 pants and 6 hats between them, is-

Maths-General
General
Maths-

Eleven animals of a circus have to be placed in eleven cages, one in each cage. If four of the cages are too small for six of the animals, the number of ways of caging the animals is-

Eleven animals of a circus have to be placed in eleven cages, one in each cage. If four of the cages are too small for six of the animals, the number of ways of caging the animals is-

Maths-General
General
Maths-

Eight chairs are numbered from 1 to 8. Two women and three men wish to occupy one chair each. First women choose the chairs from amongst the chairs marked 1 to 4; and then the men select the chairs from the remaining. The number of possible arrangements is-

Eight chairs are numbered from 1 to 8. Two women and three men wish to occupy one chair each. First women choose the chairs from amongst the chairs marked 1 to 4; and then the men select the chairs from the remaining. The number of possible arrangements is-

Maths-General
General
Maths-

A tea party is arranged of 16 persons along two sides of a long table with 8 chairs on each side. 4 men wish to sit on one particular side and 2 on the other side. In how many ways can they be seated ?</span

A tea party is arranged of 16 persons along two sides of a long table with 8 chairs on each side. 4 men wish to sit on one particular side and 2 on the other side. In how many ways can they be seated ?</span

Maths-General