I have four currency notes valued at Rs 50,100 and 2 notes of 500.In how many ways can I select the

currency note ,so that only one type of note is selected each time?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

We have 3 notes here, 50, 100 and 500.

 

So I can pick a 50 Rupee note, 100 Rupee note and a 500 Rupee note.

So I have 3 selections here.

 

I can also pick all three at the same time. (50,100,500)

This would count as one selection.

 

I can also choose two at a time

 

Hence, I can take either a 50 and a 100 rupee note, a 100 and a 500 rupee note, and a 50 and a 500 rupee note. Hence, there are 3 more cases here.

 

Total number of possible selections –3+3+1=7

Answered by  | 4th Jun, 2014, 03:23: PM