Question

In how many ways can a person choose one or more of the four electrical appliances; TV., Refrigerator, washing machine,radiogram? Plz answer,plz chp:- combination

Answer 1

Answer: 15

Step-by-step explanation:

Selecting 1 item from 4 = 4C1=4

Selecting 2 item from 4 = 4C2=6

Selecting 3 item from 4 = 4C3=4

Selecting 4 item from 4 = 4C4=1

Total ways is 15.

Answer 2

Answer:

15 ways

Step-by-step explanation:

Given :TV., Refrigerator, washing machine,radiogram

To Find :In how many ways can a person choose one or more of the four electrical appliances;

Solution :

Total appliances = 4

No. of ways of selecting 1 appliances =$^4C_1=\frac{4!}{1!(4-1)!}= \frac{4!}{3!}=4$

No. of ways of selecting 2 appliances =$^4C_2=\frac{4!}{2!(4-2)!}= 6$

No. of ways of selecting 3 appliances =$^4C_3=\frac{4!}{3!(4-3)!}= 4$

No. of ways of selecting 4 appliances =$^4C_4=\frac{4!}{4!(4-4)!}= 1$

So, total no. of ways a person can choose one or more of the four electrical appliances = 4+6+4+1=15

Hence there are 15 ways a person can choose one or more of the four electrical appliances