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If \( \Large a\ast b = 2a-3b+ab \), then \( \Large 3\ast 5+5\ast 3 \) is equal to:

A) 22
B) 24
C) 26
D) 28

Correct Answer:

A) 22

Description for Correct answer:

\( \Large 3 \ast 5 + 5 \ast 3 \)

=> \( \Large 3 \ast 5 = 2 \times 3 - 3 \times 5 + 3 \times 5 \)

6 - 15 + 15 = 6

> \( \Large 5 \ast 3 = 2 \times 5 - 3 \times 3 + 3 \times 5 \)

= 10 - 9 + 15 =16

Therefore, \( \Large 3 \ast 5 + 5 \ast 3 \)

=> 6 + 16 = 22

Part of solved Elementary Mathematics questions and answers : >> Elementary Mathematics

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