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Option 3 : + and ×

Equation we get on interchanging ‘+ and ×’:

12 ÷ 4 - 15 + 10 × 2 = 8

⇒ 3 - 15 + 20 = 8

⇒ 8 = 8

Hence, we need to change ‘+ and ×’ to prove the given equation correct.

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