Acompany surveyed 1000 people on their age and the number of jeans purchased annually. the results of the poll are shown in the table. jeans purchased annually 0 1 2 3 or more total under 12 0 69 78 73 220 12-18 10 75 70 65 220 19-25 40 77 97 76 290 over 25 36 86 128 20 270 total 86 307 373 234 1000 a person is selected at random. compute the probability of the following. (a) the person is over 25 and purchases 3 or more pairs of jeans annually. 0.2 incorrect: your answer is incorrect. (b) the person is older than 18 or purchases 1 pair of jeans annually. 0.163 incorrect: your answer is incorrect. (c) the person is in the age group 12-18 and purchases at most 2 pairs of jeans annually. 0.07 incorrect: your answer is incorrect.

a) 0.02; b) 0.704; c) 0.155

Step-by-step explanation:

a) In the row of people over 25, there are 20 in the column for 3 or more; this is out of 1000 people.  This makes the probability 20/1000 = 0.02.

b) There are two rows that are greater than 18 in age, 19-25 and over 25.  This is a total of 290+270 = 560 in these two rows.  There are also 307 people that purchased only one pair of jeans; this makes a total of 560+307 = 867 people.  However, some of these are counted twice; there are 77 people in the 19-25 category that only purchased one pair and 86 people in the over 25 category that only purchased one pair.  Taking these doubles out, we have

867-(86+77) = 704 people out of 1000; this is 704/1000 = 0.704.

c) In the 12-18 category, 10 people purchased 0 pairs, 75 people purchased 1 pair and 70 people purchased 2 pairs; this is 10+75+70 = 155 people.  This is out of 1000 people; this gives us 155/1000 = 0.155.

w

step-by-step explanation:

sas (side angle side)

aa(angle angle)

sss(side side side)

sas you have to find two sides with an angle in between

aa you find two angles because it will always add up to 180

sss find all sides

step-by-step explanation: