Answer:
(a) 350
(b) 175
(c) 21
(d) 196
Step-by-step explanation:
Number of females = 7
Number of males = 5
Total ways of selecting r items from n items is
(a)
Total ways of selecting 3 females and 2 males.
(b)
Total ways of selecting 4 females and 1 male.
(c)
Total ways of selecting 5 females.
(d)
Total ways of selecting at least 4 females.
Total ways = 4 females + 5 females