# Answer to Question #42635 in Statistics and Probability for anthea

Question #42635

1.1 The records of 400 examinees are given below:

Score

Educational Qualification

Total

Diploma

Degree

I.T

Below 50

90

30

60

180

Between 50 and 60

20

70

70

160

Above 60

10

30

20

60

Total

120

130

150

400

If an examinee is selected at random from this group, find:

1.1.1 The probability that he is a Diploma graduate. (3)

1.1.2 The probability that he is a Degree graduate, given that his scores are above

60. (3)

1.1.3 The probability that his score is below 50, given that he’s doing IT. (3)

Score

Educational Qualification

Total

Diploma

Degree

I.T

Below 50

90

30

60

180

Between 50 and 60

20

70

70

160

Above 60

10

30

20

60

Total

120

130

150

400

If an examinee is selected at random from this group, find:

1.1.1 The probability that he is a Diploma graduate. (3)

1.1.2 The probability that he is a Degree graduate, given that his scores are above

60. (3)

1.1.3 The probability that his score is below 50, given that he’s doing IT. (3)

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