Giving a test to a group of students, the grades and gender are summarized below Grades...

Question

Question

Answer 1

Answer #1

Solution:-

Probability = number of favoriable conditions/total number of conditions

1) by using table total genders = 2+18+16+20+19+12 = 87

Probability = (18+19)/87 = 37/87 = 0.42528 = 0.4253 (rounnded)

2) by using table total genders = 13+17+14+19+3+20 = 86

Probability = (13+17+14)/86 = 44/86 = 0.5116 (rounded)

3) by using table

Probability (C) = 17/74 = 0.2297

Probability (C') = 1 - 0.2297 = 0.7703

4) P(A) = 80+643 = 723

P(B) = 51+80 = 131

P(A or D) = P(P) + P(D) - P(P and D)
= (723/989) + (131/989) - (80/989)
= 0.7826

Answer 2

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