Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. a pollster contacts 86 people in the 18-21 age bracket and finds that 74 of them respond and 12 refuse to respond. when 257 people in the 22-29 age bracket are contacted, 236 respond and 21 refuse to respond. suppose that one of the 343 people is randomly selected. find the probability of getting someone in the 22 dash 29 age bracket or someone who refused to respond.

Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 93 people in the 18-21 age bracket and finds that 79 of them respond and 14 refuse to respond. When 261 people in the 22-29 age bracket are contacted, 241 respond and 20 refuse to respond. Assume that 1 of the 354 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who agreed to respond

Step-by-step explanation:

93.8

step-by-step explanation:

lets say, first number = x

second number = 3x+7

total = 49

(x)+(3x+7)= 49

4x+7 = 49

4x = 42

x = 42/4

x= 10.5

x= 10.5

3x+7 = 3(10.5)+7 = 93.8

hope this

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.