A card is chosen at random from a standard deck of 52 playing cards. What is the probability that the card chosen is a queen?

Probability = 4/52

= 1 / 13

Step-by-step explanation:

Total number of cards = 52

Prob of choosing a queen

In a deck of card there are 4 queens

Probability = 4/52

= 1 / 13

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0