Answer:
(a) 896
(b) 1000
(c) 910
Step-by-step explanation:
Number of women = 8
Number of men = 6
A committee consisting of 3 men and 3 women is to be formed.
(a) 2 of the men refuse to serve together.
Number of men who don't want to serve together = 2
Remaining men = 4
Total ways = Both men who don't want to serve together are not selected + only one of them is selected.


(b) 2 of the women refuse to serve together.
Number of women who don't want to serve together = 2
Remaining men = 6
Total ways = Both women who don't want to serve together are not selected + only one of them is selected.


(c)1 man and 1 woman refuse to serve together.
Ways = Total ways - Both man and woman are select who refuse the serve together


Y - ,2.5
X 0,3.5
Your welcome
Amount invested in stocks
5,000×0.60
=3,000
after one year gains 9%
3,000×(1+0.09)
=3,270
After second year loses 4%
3,270×(1−0.04)
=3,139.2 amount after second year
So Stocks gained 139.2 (3139.2-3000)
Amount of saving account
5,000×0.40
=2,000
After 2 years
2,000×(1+0.049)^(2)
=2,200.802
So it gained 200.802 (2200.802-2000)
Total amount after 2 years
3,139.2+2,200.802
=5,340.002
Gained 340.002 (5340.002-5000)
Total hours working = 4.5 hrs
hours doing laundry = 1 hr
Percentage of time doing laundry = 1/4.5
Percentage of time doing laundry = 22.22%