Which two numbers should be interchanged to make the given equation correct?
78 ÷ 48 × 8 + (26 × 7) – 39 + (45 + 15) = 210
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. 48 and 39.
Given equation: 78 ÷ 48 × 8 + (26 × 7) – 39 + (45 + 15) = 210
Let us check all the options:
Option 1: 78 and 45
The expression becomes:
= 45 ÷ 48 × 8 + (26 × 7) – 39 + (78 + 15)
= 243.5 is not equal to 210.
Option 2: 45 and 48
= 78 ÷ 45 × 8 + (26 × 7) – 39 + (48 + 15)
= 219.86 is not equal to 210.
Option 3: 48 and 39
= 78 ÷ 39 × 8 + (26 × 7) – 48 + (45 + 15) = 210
= 210 is equal to 210.
As we have found our answer, we need not check the other options.
Hence, option 3 is the correct answer.