In a class of eighth standard, among students passed in Maths, Rakhee stands serially $21$ st and $34$ th from bottom. $4$ students were absent. $9$ students failed. If there are $37$ boys in the class, find the number of girls in the class.

30

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55

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68

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69

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Solution

The correct option is A $30$
Rakhee is $21^{s t}$ if arranged serially.
So, there are $20$ students before Rakhee.
She is $34^{t h}$ from bottom. So, there are $33$ students after Rakhee.
$9$ students failed and $4$ were absent.
$∴$ Total no. of students $= 20 + 33 + 4 + 9 + 1 = 67$
No. of boys is $37$ .
So, no. of girls $= 67 - 37 = 30$
Hence, option A is correct.

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In a class of eighth standard, among students passed in Maths, Rakhee stands serially 21st and 34th from bottom. 4 students were absent. 9 students failed. If there are 37 boys in the class, find the number of girls in the class.

In a class of eighth standard, among students passed in Maths, Rakhee stands serially $21$ st and $34$ th from bottom. $4$ students were absent. $9$ students failed. If there are $37$ boys in the class, find the number of girls in the class.