In a class,the ratio of pupils who wear watches to those who do not wear watches is 5:3. if there are 40 pupils in the class,find the number of pupils who do not wear watches.
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Answer:
ratio =5:3
total no. of students= 40
sum of ratio terms =5+3=8
for those who wear watches = 5/8*40
=25
25 pupil wear watches and
those who don't wear = 40-25
= 15
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15 is the answer
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