select one ice cream bar from a box containing 12 bars. The box contains four chocolate bars (C), four strawberry bars (S), and four vanilla bars (V). Suppose the two students select their ice cream bars at random. The probability for each possible selection is given in the table below. Bars Selected CC CV CS SC SS SV VC vs VV 4 4 4 1 4 4 4 Probability II 33 33 33 Π 33 33 33 11 Find the expected number of vanilla bars selected.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter0: Preparing For Algebra
Section: Chapter Questions
Problem 64PRT
Question

why the correct answer is letter B?

As a reward for completing a reading challenge, two elementary school students are allowed to
select one ice cream bar from a box containing 12 bars. The box contains four chocolate bars (C),
four strawberry bars (S), and four vanilla bars (V). Suppose the two students select their ice cream
bars at random. The probability for each possible selection is given in the table below.
Bars Selected CC CV CS SC
Probability
Find the expected number of vanilla bars selected.
4
33
33
SS SV VC VS VV
4
33
3
33
-E
+3
1
Π 33 33 33
4
4
1
(A) bars
(B)
@
6M
bars
bars
19
(D)
bars
(E) 1 bar
Transcribed Image Text:As a reward for completing a reading challenge, two elementary school students are allowed to select one ice cream bar from a box containing 12 bars. The box contains four chocolate bars (C), four strawberry bars (S), and four vanilla bars (V). Suppose the two students select their ice cream bars at random. The probability for each possible selection is given in the table below. Bars Selected CC CV CS SC Probability Find the expected number of vanilla bars selected. 4 33 33 SS SV VC VS VV 4 33 3 33 -E +3 1 Π 33 33 33 4 4 1 (A) bars (B) @ 6M bars bars 19 (D) bars (E) 1 bar
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