Question

Question 13.

In how many ways can 3 students be selected from a group of 12 students to represent a school

in the inter school essay competition?​

Answer 1

Answer:

In 4 groups of 3 students

Answer 2

Answer:

220 ways

Step-by-step explanation:

the students can be selected by the following method

the 1st student can be anyone from the 12 students

the 2nd one can be any one from 12-11 students

the 3rd student can be anyone from 12-2students

thus (in the pic)