Question
When 40% of a number is added to the number itself, the
result is 21 more than the original number. What is the resulting number?Solution
ATQ,
Let the number be ‘x’
According to the question,
0.40x = 21
⇒ x = 21 / 0.40 = 52.5
Required number = 52.5 + 21 = 73.5
Unit less measure of dispersion is
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