Question

Help me ans should be well explained ​

Answer 1

Step-by-step explanation:

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The lowest rank of the class is unknown to us.

Let's say, it's x.

highest marks =2 × lowest rank + 7

=> 87 = 2x + 7 (this is the equation we gotta solve)

=> 87 - 7 = 2x

=> 2x = 80

=> x = 40

And x is the lowest rank of the class, so we got the required answer.

$\boxed{ \mathfrak{lowest \: rank = \red{40}}}$

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it can be 17 since the denominators are in increasing order and 17 only fits in.

I'm looking for any other pattern that can be present here.

Answer 2

#1

• Let the lowest mark be x

ATQ

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

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

$\\ \sf\longmapsto x=\dfrac{80}{2}$

$\\ \sf\longmapsto x=40$

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