Question

cores 80%in physics and 66%in chemistry
marks of both the papers are 100
t does he score in maths which is of 200
he scores 80% marks in all the three
Wha
84%
(c) 87%
(d) 839​

Answer 1

Answer:

87 %

Step-by-step explanation:

80/100 + 66/100 + x/200 = 320/400

x = 174 = 87%

Answer 2

$\huge\bigstar\mathfrak\blue{\underline{\underline{SOLUTION:}}}$

In Physics 80 out of 100

In chemistry 66 out of 100

In maths x out of 200

So,

Total marks= 100+100+200= 400

Total marks= 100+100+200= 400Total scored=146+x

$scored \: \% = \frac{146 + x}{400} \times 100 = 80 \\ \\ = > 146 + x = 320 \\ \\ = > x = 320 - 146 \\ \\ = > x = 174$

In maths 174 out of 200,

$\% = \frac{174}{200} \times 100 \\ \\ = > 87\%$

Option (c)✓

Hope it helps ☺️