Question on: JAMB Mathematics - 2007

The table above shows the number of pupils in each age group in a class. What is the probability that a pupil chosen at random is at least 1 years old?
A
27/40
B
17/20
C
3/30
D
33/40
Ask EduPadi AI for a detailed answer
Correct Option: B
P(At east 11 yrs) = P(11yrs) + P(12yrs)
= 27/40 + 7/40
= 34/40
= 17/20

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