यदि 11$25 = 18, 12$20 = 16 तो 4$50 = ?का मान ज्ञात कीजिए ।

Options

A. 42
B. 17
C. 27
D. 37

Answer

C

Explanation

`11" "$" "25 = 18`
`rArr (11 +25)/2 = 18`
`rArr 36/2 = 18`
`12 $ 20 = 16`
`rArr(12 + 20)/2 = 16`
`rArr 32/2 = 16`
अतः ,
`4 $ 50 = ?`
`rArr ? = (4 +50)/2 = 54/2 = 27`