Assume that of the 300 seniors who moved on from Schwarzchild High School the previous spring, some have occupations, some are going to school, and some are doing both. The accompanying Venn chart shows the quantity of graduates in every class.

c and not j c and j and not c

30 45 135

C=go to school J=have a task

What is the likelihood that an arbitrarily chosen graduate has some work on the off chance that the person is going to school? Offer your response as a decimal exact to two decimal spots.

p=

What is the likelihood that a haphazardly chosen graduate goes to school in the event that the individual in question has some work? Offer your response as a decimal exact to two decimal spots.

p=

An understudy as of late took an insights test and the educator has posted that the mean was 67 % with a standard deviation of 9 %. The teacher will give out the tests toward the start of one week from now, notwithstanding, this understudy chooses to figure a couple of amounts to ideally reassure they.

a) What is the likelihood that they scored above 70%? (round to four decimal spots)

b) What is the likelihood that they scored underneath 60%? (round to four decimal spots)

c) What is the likelihood that they scored between 70-90%? (round to four decimal spots)

d) Would the likelihood of the understudy breezing through the assessment (score above 70%) increment or diminishing if the mean expanded and the standard deviation remained something similar? Legitimize your answer.

i8i

e) Would the likelihood of the understudy finishing the assessment (score above 70%) increment or lessening if the mean remained something very similar and the standard deviation expanded? Legitimize your answer.

f) Suppose that both the mean expanded and standard deviation expanded. Does the understudy's likelihood of breezing through the test:

certainly increment

certainly decline

can either diminish or increment

Legitimize your answer.

g) Suppose that both the mean expanded and standard deviation diminished. Does the understudy's likelihood of finishing the test:

unquestionably increment

unquestionably decline

can either diminish or increment

Legitimize your answer.

A store accumulates some segment data from their clients. The accompanying outline sums up the age-related data they gathered:

Age Number of Customers

<20<20 90

20-30 72

30-40 60

40-50 56

50-60 93

6060 53

One client is picked indiscriminately for a prize giveaway.

What is the likelihood that the client is in any event 30 yet no more seasoned than 60?

What is the likelihood that the client is either more seasoned than 50 or more youthful than 30?

What is the likelihood that the client is at any rate 50?