Question

Help me
ans should be well explained ​

Answer 1

#1

• Let the lowest mark be x

ATQ

`\\ \sf\longmapsto 2x+7=87`

`\\ \sf\longmapsto 2x=87-7=80`

`\\ \sf\longmapsto x=(80)/(2)`

`\\ \sf\longmapsto x=40`

Option B

#B

• Observe all numbers in series

If numerator be n then denominator is 2n+1

For example

2nd term is 6/13

Where

• 2(6)+1=13

Now

in the third term numerator is 8

Denominator:-

`\\ \sf\longmapsto 2(8)+1=16+1=17`

Option A