X has mean 4, Y has mean 7. Let T = 2X + 3Y.
What is E(T)?
- A
11
- B
21
- C
32
- Dcheck_circle
29
Explanation
E(T) = 2(4) + 3(7) = 8 + 21 = 29.
Combining Random Variables
AP Statistics· difficulty 4/5
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AP Statistics· difficulty 4/5
X has mean 4, Y has mean 7. Let T = 2X + 3Y.
What is E(T)?
11
21
32
29
Explanation
E(T) = 2(4) + 3(7) = 8 + 21 = 29.
Want 10 more like this — adaptive to your weak spots?