The bar graph below shows the percentage break-up of the number of student who visited various touris spots on new Year evening.

The table shows the total numbers of students om classes X,XI and XII .
`{:("Class","No. of students"),(X,420),(XI,480),(XII,400):}`
What is the difference between the number of students who did not got to any tourist spotfrom class XI and that from class XII ?

Options

A. 19
B. 41
C. 27
D. 21

Answer

B

Explanation

No of students from class XI who didn't visite any place
`=450-((50)/(100)xx150+(50)/(100)xx200+(30)/(100)x250+(40)/(100)xx+(30)/(100)xx200)`
`=450+(75+100+75+140+160)`
`=480-450=30`
No of students from XII who didn't visit any place
`=400-((30)/(100)xx150+(20)/(100)xx200+(10)/(1000)xx250+(34)/(100)xx350+(50)/(100)xx200)`
`=400-(45+40+25+119+119)`
`=400-(329)=71`
Required Difference `=71-30=41`