Let the number be x.
40% of the number is =
20% of 40% of the number is =
=
Given 20% of 40% of the number x is 10 greater than half the number x.
Half the number x =
So we can write the equation as ,
Now to find x, we will have to move (0.5x) to the left side by subtracting it from both sides. We will get,
Now to find x we will move (-0.42) to the right side by dividing it to both sides.
We will have to simplify 1000 and 42 by dividing the numerator and denominator by a common factor of it. 2 is a common factor of 1000 and 42.
So by dividing 1000 and 42 by 2 we will get,
We have got the required answer here. Option A is the correct option here.
I think it is submit
Hope this helps
What measure of spread is used when your data distribution is symmetrical?
Answer: When the data distribution is symmetrical, the appropriate measure of spread is standard deviation. The reason is both sides of symmetrical distribution will have same spread.
Symmetrical distribution: Symmetrical distribution is one when both sides of the distribution are identical. The symmetrical distribution is bell shaped and mean, median and mode are equal in symmetrical distribution.
Standard deviation: Standard deviation is the measure of dispersion. It measures the deviation of a set of numbers from its mean. It is defined as the square root of means of the squared deviations from the arithmetic mean