Which two signs should be interchanged to make the given equation correct?
$$121 + 11 - 42 \times 6 \div 7 =83$$
$$121 + 11 - 42 \times 6 \div 7 =83$$
From the option C,
$$121 + 11 - 42 \div 6 \times 7 =83$$
$$121 + 11 - 42 \div \frac{1}{6} \times 7 =83$$
$$121 + 11 - 49 =83$$
83 = 83
$$\therefore$$ The correct answer is option C.
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