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In a quiz, each correct answer earns +5 and each wrong answer −2. Meena got 12 right and 5 wrong. Which expression gives her score?

Class 7Integer Expressions with BracketsIntegers

A $12 \times 5 - 5 \times (- 2)$
B $12 \times 5 + 5 \times (- 2)$
C $(12 + 5) \times (5 - 2)$
D $12 \times (- 2) + 5 \times 5$

Step-by-Step Solution

Right answers:

12 \times 5

. Wrong answers:

5 \times (- 2)

. Score

= 60 - 10 = 50. (12 \times 5 - 5 \times (- 2)

would wrongly add 10.)

Answer: B)

12 \times 5 + 5 \times (- 2)

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