2007
Mathematics
67ca00ce0c643c71d77dee1f
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 11 years old?
A.
27/40
B.
17/20
C.
3/30
D.
33/40
Correct Answer: 17/20
Explanation
P(At least 11 yrs) = P(11yrs) + P(12yrs) = 27/40 + 7/40 = 34/40 = 17/20
P(At least 11 yrs) = P(11yrs) + P(12yrs) = 27/40 + 7/40 = 34/40 = 17/20THIS WEEK's
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