Question

A picnic party of four persons is to be selected from 8 Engineers and 3 Doctors
so as to include at least one Doctor. The possible number of ways are​

Answer 1

Answer:

ans. is 3:11

i.e d,e

d,d

e,d

Answer 2

Answer:

260

Step-by-step explanation:

if 1 doctor and 3 engineers

8c3=56

3c1=3

56*3=168

if 2 doctor and 1 engineer

2d n 2e

3c2=3 8c2=28

28*3=84

if 3 doctor and 1 engineer

3d and 1e

3c3=1 8c1=8

8*1=8

so sum is=168+84+8=260