Question

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Answer 1

(b)

Total frequencies:

• 25 - 4 = 21

Multiples of 3 or 5:

• 6, 9, 10, 12, 15, 18, 20, 21, 24, 25 - total of 10

Required probability:

• P(3x or 5x) = 10/21

(c)

• Limes = 10 + 6 = 16
• Apples = 8 + 6 = 14
• Total = 16 + 14 = 30

(i) Good limes = GL = 10

• P(GL, GL) = 10/30*9/29 = 3/29

(ii) Good fruits = GF = 10 + 8 = 18

• P(GF, GF) = 18/30*17/29 = 51/145

(iii) Good apple = GA = 8, Bad lime = BL = 6

• P(GA&BL or BL&GA)) = 8/30*6/29 + 6/30*8/29 = 16/145