Q10 of 118 Page 17

Write the number of ways in which 12 boys may be divide into three groups of 4 boys each.

Number of groups in which 12 boys are to be divided = 3

Now 4 boys can be chosen out of 12 boys in (¹²C₄⁸C₄⁴C₄) ways.

These groups can be arranged in 3! ways.

Total number of ways =

= 5775

Write the number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines.

Write the number of ways in which 5 red and 4 white balls can be drawn from a bag containing 10 red and 8 white balls.

Write the total number of words formed by 2 vowels and 3 consonants taken from 4 vowels and 5 consonants.

Mark the correct alternative in the following:

If , then is equal to