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primary 6 | Maths
| Data Analysis
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Please help how do we get this
Date Posted: 3 years ago
Views: 279
Easy.
You've already gotten the totals of first and second, second and third , and third and fourth
First + last number
= first + second + third + last - second - third
= 26 + 10 - 14
= 22
Average of the first and last
= 22 ÷ 2
= 11
You've already gotten the totals of first and second, second and third , and third and fourth
First + last number
= first + second + third + last - second - third
= 26 + 10 - 14
= 22
Average of the first and last
= 22 ÷ 2
= 11
A+B = 2×13 = 26
C+B = 2×7 = 14
C+D = 2×5 = 10
A-C = 26-14 = 12
B-D = 14-10 = 4
A+D-C-B = 12-4 = 8
A+D = 8+B+C = 8+14 = 22
22÷2 = 11 (Ans)
C+B = 2×7 = 14
C+D = 2×5 = 10
A-C = 26-14 = 12
B-D = 14-10 = 4
A+D-C-B = 12-4 = 8
A+D = 8+B+C = 8+14 = 22
22÷2 = 11 (Ans)
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