Age in years	10	11	12
Number of pupils	6	27	7

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?

Ivystone

5 years ago

I wasn't given any questions on mathematics

montty

10 years ago

total=40

at least 11=11 and above=27+7=34

P(at least 11)=34/40=17/20

maryjane chiemelie ibemesi

10 years ago

The selected answer is wrong:

how did they arrive at the answer please i need explainations... am really confused right now

JinmiBamidele JB

10 years ago

11\40 +12\40=23\40 so therefore 1_23\40=27\40

BlessingAnu29

9 months ago

the table in question above is not clear

fweshswift

10 years ago

p( total) =40

p(at least 11)=27+6=33

probability= no of required outcome/possible outcome = 33/40