Neha scored 1.2 times as many marks in Maths as in History. In Biology, she scored 20 more marks than in Maths. If she secured in aggregate 85.5% out of a total of 600, what was her score in Biology?
Answers
Answer:
B = 186.9
Step-by-step explanation:
she secured in aggregate 85.5% out of a total of 600
=> total marks secured = (85.5/100) * 600
= 513
Let say Say she scored = B marks in Biology
in Biology, she scored 20 more marks than in Maths
=> in Maths She scored = B - 20
Neha scored 1.2 times as many marks in Maths as in History
=> Marks scored in history = (B - 20)/1.2
B + B - 20 + (B-20)/1.2 = 513
=> 2B + (B - 20)/1.2 = 533
=> 2.4B + B - 20 = 615.6
=> 3.4B = 635.6
=> B = 186.9
Answer:
Step-by-step explanation:
she secured in aggregate 85.5% out of a total of 600
=> total marks secured = (85.5/100) * 600
= 513
Let say Say she scored = B marks in Biology
in Biology, she scored 20 more marks than in Maths
=> in Maths She scored = B - 20
Neha scored 1.2 times as many marks in Maths as in History
=> Marks scored in history = (B - 20)/1.2
B + B - 20 + (B-20)/1.2 = 513
=> 2B + (B - 20)/1.2 = 533
=> 2.4B + B - 20 = 615.6
=> 3.4B = 635.6
=> B = 186.9