yurybell
19.01.2021 •
Mathematics
A survey revealed that 60% of people are entertained by reading books, 50% are entertained by watching TV, and 20% are entertained by watching both books and TV. What is the probability that a person will be entertained by books or TV
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Ответ:
Question seem incorrect because 60%,50% and 20% sum up to more than a 100% therefore we've made a little correction
0.8
Step-by-step explanation:
Probability = number of favorable outcomes/number of outcomes
Given that 30% are entertained by reading books
50% are entertained by watching TV
20% are entertained by reading books and watching TV
The probability that a person will be entertained by books or TV =
30/100+50/100= 3/10+5/10
=8/10
=0.8
Ответ:
3)0 to 9-add 9. 2 to 5-add 3. 4 to 1-subtract 3. 6 to -3- subtract 9. (Basically it's either add or subtract a number)
5)dunno, sry