Sagot :
Answer:
1. 105
Solution:C, 2/5 = 15×4/2=105
2. 120
Solution: 5×4×3×2×1=120
3. 1. 967,689
2. 8,467,200
Solution: {There are 4 vowels and 7 letters aren't vowels}
4. 16,380
Solution: From the question information this is an unordered choice first at all, choose 2 from 9 women= C(9,2)
Then choose 3 from 15 Men=C(15,3)
N=(9,2) • (15,3)
=9×3/2×1 • 15×14×13/3×2×1 {Calculate carefully}
=16,380
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