My lap top battery lasts 4 1/3 hours . If each DVD movie lasts 1 2/3 hours , how many complete movies can I watch before the lap
1 answer:
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Answer:
P( At least one of the two cards was a heart)=7/16
Step-by-step explanation:
The solution to this question can be found in two ways.
First way: Since total number of heart in a deck are four,
Probability that neither of two cards had a heart is that at both times the card drawn was not a heart, since it is an independent event, thus probability both were not heart= ×
=
Thus, Probability that at least one of the two cards was a heart= 1- P( Neither of two cards had a heart= 1-
=
Second way:
Probability that first card drawn is a heart and the second one is not a heart= ×
=
Probability that the first card drawn is not a heart and the second one is a heart= ×
=
Probability that both cards drawn are hearts= ×
=
Adding all these probabilities, we have the probability that at least one of the card drawn was heart=
Answer:
8900
Step-by-step explanation:
25 * 89 / = 25 * 89 * 4 = 100 * 89 = 8900