Question

Jack scored a total of 175 marks for English and Mathematics. He scored a total of 164 marks for English and Science. He scored 11 more marks for English than for Mathematics. What was his score for Science?

Answer 1

let English marks =E

Maths marks = M

Science marks =S

E+M=175 ................(1)

E+S=164...................(2)

E=M+11.......................(3)

PLUGGING VALUE OF "E" IN EQUATION (2) FROM (3)

M+11 +S=164

S=153-M............(4)

PLUGGING VALUE OF "E" IN EQUATION (1) FROM (3)

M+11+M=175

2M=164

M=82

PLUGGING THIS VALUE OF 'M' IN EQUATION (4)

S=153-82

S=71

SCORE OF SCIENCE IS 71