Asurvey revealed that 31% of people are entertained by reading books, 37% are entertained bywatching tv, and 15% are entertained by both books and tv. what is the probability that a personwill be entertained by either books or tv? express the answer as a percentage

53%

Step-by-step explanation:

People are entertained by reading books =  P(a) = 31%

People are entertained by watching TV = P(b) = 37%

People are entertained by both books and TV P(a∩b) = 15%

Probability (either books or TV) = P(a) + P(b) - (a∩b)

                                                    = 0.31 + 0.37- 0.15

                                                    = 0.68 - 0.15

                                                    = 0.53 = 53%

Probability that a person will be entertained by either books or TV is 53%.

h

step-by-step explanation:

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,