Simon E's answer to Rosie's Secondary 4 E Maths Singapore question.
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a)
P(Red or Blue) = P(Red) + P(Blue)
3/7 = P(Red) + 1/3
P(Red) = 2/21
b)
P(Green) = 1 - P(Red or Blue) = 4/7
P(Red or Green) = P(Red) + P(Green)
=14/21
P(Red or Blue) = P(Red) + P(Blue)
3/7 = P(Red) + 1/3
P(Red) = 2/21
b)
P(Green) = 1 - P(Red or Blue) = 4/7
P(Red or Green) = P(Red) + P(Green)
=14/21
Date Posted:
8 months ago
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