1. How many small squares are in Step 10?
1 answer:
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Y = 
, x > 0
Answer:
2470
Step-by-step explanation:
Roxie must pick 3 movies from 20 horror films and 8 foreign films with at least two horror films.
i) She can pick 2 horror films and 1 foreign film
The number ways this is possible = C(20, 2) * C(8, 1)
The number ways this is possible = C(20, 2) * C(8, 1) = 190 * 7 = 1330
ii) She can pick 3 horror films
The number ways this is possible = C(20, 3)
The number ways this is possible = C(20, 3) = 1140
The number of ways of picking 3 movies from 20 horror films and 8 foreign films with at least two horror films = pick 2 horror films and 1 foreign film + pick 3 horror films
The number of ways of picking 3 movies from 20 horror films and 8 foreign films with at least two horror films = 1330 + 1140 =2470