Question

Olivia tossed two fair two-sided coins. In a game, she earns 4 points if exactly one coin lands on heads and 6 points if both coins land on heads. If points are not earned for tails, what is the expected value of the points earned?


A. 3 1/3
B. 3 1/2 ***
C. 5
D. 6

Answer 1

coin 1 **h t
coin 2 h 6 4
coin 2 t 4 0

p(6 points) = 1/4
p(4 points) = 1/2
p(0 points) = 1/4

(1/4)6 + (1/2)4 = 2 + 1.5 = 3.5
so I agree with you

Answer 2

The answers to the LEAP Math Midtest- 7 (GT) are:

C
B
D
B
A
A
C
D
B
D
A
C
B
C
A
D
C
D
B
A
C
A
B
D
C
A
D
B
C
C
A
B
D
C
D
B
C
D
B
A
C
B
D
A
B
A
C
D
D
B