Management for a chain of restaurants recorded the number of appetizers, X, ordered by tables dining. They observed that X had the following probability distribution.
Value of X
0
1
2
3 or more
Probability
0.60
0.35
0.04
0.01

Reference: Ref 9-7

The probability that a randomly chosen table orders at least one appetizer is
A. 0.35.
B. 0.39.
C. 0.40.
D. none of the above.

Question

Management for a chain of restaurants recorded the number of appetizers, X, ordered by tables dining. They observed that X had the following probability distribution.
Value of X
0
1
2
3 or more
Probability
0.60
0.35
0.04
    0.01
 
Reference: Ref 9-7

The probability that a randomly chosen table orders at least one appetizer is
A.	0.35.
B.	0.39.
C.	0.40.
D.	none of the above.

konradzuse · Answer

Same thing... 0.01 + 0.35 + 0.04 = .40 or 1-0.6 = 0.40.

konradzuse · Answer

@CliffSedge

anonymous · Answer

I choose a card at random from a well-shuffled deck of 54 cards (the usual 52 cards plus two jokers). There is a 13/54 probability that the card chosen is a spade, a 13/54 probability that the card is a heart, a 13/54 probability that the card is a diamond, and a 13/54 probability that the card is a club. Both spades and clubs are black cards, while hearts and diamonds are red. In addition, one of the jokers is a black card and the other joker, a red card.
Reference: Ref 10-4

What is the probability that the card chosen is red?
A.	.25
B.	.50
C.	.75
D.	1.00