Question

V. Following is the frequency distribution of weights (in kg) of 50 persons in a locality
30-35
35-40
Weight (kg)
No. of men
40-45
45-50
50-55
7
11
16
12
Answers the following questions.
(a) What is the upper limit of second class interval?:
(b) How many persons have weight between 40-45 kg?:
(c) What is the class size? :
(d) What is the number of persons in the heaviest weight group?:​

Answer 1

Answer:

Root Maths Formulas

Square Root :

If x2 = y then we say that square root of y is x and we write √y = x

So, √4 = 2, √9 = 3, √36 = 6

Cube Root:

The cube root of a given number x is the number whose cube is x.

we can say the cube root of x by 3√x

√xy = √x * √y

√x/y = √x / √y = √x / √y x √y / √y = √xy / y.