Important for :

1

2

3

4

B

A team of seven children consisting of at least five girls can be formed in the following waysReqd no. of selections =

= | 7 × 6 | × | 5 × 4 | + 7 × | 5 | + 1 |

2 | 2 | 1 |

= 21 × 10 + 7 × 5 + 1 = 210 + 35 + 1 = 246

Hence, option B is correct.

5

There are various ways in which objects from a set can be selected, generally without replacement to form subsets. The selection of subsets is known as permutation when order of selection is a factor, a combination is when the order is not a factor.

Permutation and combination is an important topic for any competitive exam. At Smartkeeda we have covered this topic in depth, so you can understand and gain mastery over this topic.

Practice daily at Smartkeeda with in-depth explanation to gain an understanding of the topic and improve your score.

Regards

**Team Smartkeeda**

Permutation and combination is an important topic for any competitive exam. At Smartkeeda we have covered this topic in depth, so you can understand and gain mastery over this topic.

Practice daily at Smartkeeda with in-depth explanation to gain an understanding of the topic and improve your score.

Regards