An electrical panel has five switches. How many ways can the switches be positioned up or down if three switches must up and two must be down?
a. 10 b. 42 c. 120 d. 220
a. 10 b. 42 c. 120 d. 220
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Answer:
10
Step-by-step explanation:
Up - 123, 124, 125, 134, 135, 145, 234, 235, 245, 345
✒️Answer ✒️
•A.10
☁️Solution ☁️
5!/3!(2!)=
120/6(2)=
120/6(2)=120/12=10
-Yishiro