The Alphabet Game costs $0.25 to play. Before the game, 26 slips of paper, each with a different letter of the alphabet on it, are put into a bag. A player
draws one slip from the bag. If the player draws a vowel (A, E, I, O, or U), he or
she wins $1. What is the probability of winning the game?

the expected value of the random variable : 0, 1 and 2

step-by-step explanation:

b

step-by-step explanation:

the word superfluous means unnecessary

x = ±sqrt(10)

step-by-step explanation:

5 - 2x² = -15

subtract 5 from each side

5-5 - 2x² = -15-5

-2x^2   = -20

divide by -2 on each side

-2x^2   /-2= -20/-2

x^2 =10

take the square root on each side

sqrt(x^2 )=±sqrt(10)

x = ±sqrt(10)

check:

5 - 2x² = -15

+sqrt(10)

5 - 2(sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15

-sqrt(10)

5 - 2(-sqrt(10))² = -15

5 -2(10) = -15

5 -20 = -15

-15 = -15