1.

Raj scored 67, 69, 78, and 88 in 4 of his subjects. What should be his score in the 5th subject so that his average equals 80?1). 882). 903). 964). 98

Answer»

LET the SCORE in 5th subject be X

⇒ Total score = 67 + 69 + 78 + 88 + x = 302 + x

⇒ Average = total marks/total subject

⇒ 80 = (302 + x)/5

400 = 302 + x

⇒ x = 98

∴ score in 5th subject should be 98


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