1. Suppose half of all newborns are girls and half are boys. Hospital A, a large city hospital, records an average of 50 births
2 answers:
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Number of girls at the time of the assembly started = w
Number of girls left = 40% of w
Remaining girls =
Now, the ratio of the number of boys to girls became 3 to 4.
Let n be the number of boys.
Then,
Or,
20n = 9w
or, n =
Total number of boys and girls =
Hence, the total number of boys and girs is
Given is square root of a negative real number, i.e.
When we find square root of positive real numbers, we get Real answers.
But when we find square root of negative real numbers, we get Imaginary answers. To solve them, we can split the given negative number into product of -1 and the number itself but with positive sign. e.g. -4 = -1 x 4.
For square root of -1, we use english letter 'i' called Imaginary unit i.e.
Now we can use -0.25 = -1 x 0.25
Hence, "0.5i" is the final answer.