A-s marks in Biology are 20 than 25- of the total marks obtained by him in Biology- Maths and Drawing- his marks in Drawing be 50- what are his marks in Maths-454050cannot be determined

Question

Toppr Admin · Accepted Answer

Let marks in-xA0- Biology-B - Maths-M- Drawing-Dgiven that - D-50 and thatB-25-of-B-M-D-x2212-20B-25100-B-M-D-x2212-20B-20-14-B-M-50-4B-80-B-M-503B-30-M-x2234- maths marks cannot be known without knowing B

0-10	10-20	20-30	40-50	60-70	20-30
40-50	40-50	0-10	40-50	40-50

A's marks in Biology are $20$ less than 25% of the total marks obtained by him in Biology, Maths and Drawing. if his marks in Drawing be $50$ , what are his marks in Maths?
$45$
$40$
$50$
cannot be determined

Let marks in Biology $= B$ , Maths $= M$ , Drawing $= D$

given that , $D = 50$ and that

$B = 25 % o f (B + M + D) - 20$

$B = \frac{25}{100} (B + M + D) - 20$

$B + 20 = \frac{1}{4} (B + M + 50)$

$4 B + 80 = B + M + 50$

$3 B + 30 = M$

$∴$ maths marks cannot be known without knowing $B$

A's marks in Biology are 20 less than 25% of the total marks obtained by him in Biology, Maths and Drawing. if his marks in Drawing be 50, what are his marks in Maths?454050cannot be determined

Let marks in Biology=B , Maths=M, Drawing=Dgiven that , D=50 and thatB=25%of(B+M+D)−20B=25100(B+M+D)−20B+20=14(B+M+50)4B+80=B+M+503B+30=M∴ maths marks cannot be known without knowing B

A's marks in Biology are $20$ less than 25% of the total marks obtained by him in Biology, Maths and Drawing. if his marks in Drawing be $50$ , what are his marks in Maths?
$45$
$40$
$50$
cannot be determined

Let marks in Biology $= B$ , Maths $= M$ , Drawing $= D$

given that , $D = 50$ and that

$B = 25 % o f (B + M + D) - 20$

$B = \frac{25}{100} (B + M + D) - 20$

$B + 20 = \frac{1}{4} (B + M + 50)$

$4 B + 80 = B + M + 50$

$3 B + 30 = M$

$∴$ maths marks cannot be known without knowing $B$