Question

sum of marks in ss and English is 30 if one gets 3 marks less in ss and 3 marks more in English the product of marks is 225 find both the marks​

Answer 1

Marks in SS = 18 & Marks in English = 12

Step-by-step explanation:

Let say Marks in SS = M

Then Marks in English = 30 - M

3 Marks less in SS = M - 3

3 Marks more in English  = 30 - M + 3 = 33 - M

(M - 3)(33 - M) = 225

=> 33M + 3M - 99 - M² = 225

=> M² - 36M + 324 = 0

=> M² - 18M - 18M + 324 =0

=> (M - 18)² = 0

=> M = 18

Marks in SS = 18

Marks in English = 12