Solution
Given : 7*7 = 140, 6*1 = 70 and 3*5 = 80
If we replace '*' with '+', and multiply the sum by 10, we get the desired result.
Eg :- $$(7+7)\times10=140$$
and $$(6+1)\times10=70$$ and $$(3+5)\times10=80$$
Similarly, $$(4+4)\times10=80$$
=> Ans - (B)
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