Question

If the readings of thickness of metal plate are 1.612 cm, 1.611 cm, 1.613 cm, 1.612 cm respectively, then the average reading will be ____

a) 1.611 cm
b) 1.612 cm
c) 1.613 cm
d) 5.2395 cm​

Answer 1

Answer:

average reading of thickness (1.612+1.611+1.613+1.612)/4=1.612

answer is 1.612

Answer 2

Given :

R₁ = 1.612 cm

R₂ = 1.611 cm

R₃ = 1.613 cm
R₄ = 1.612 cm

To Find :

The average reading

Solution :

The average can be defined as the mean value which is equal to the ratio of the sum of the number of observations to the total number of observations.

Average = (Sum of the observations) ÷ (No. of observations)

∴ The average reading = $\frac{1.612 + 1.611 + 1.613 + 1.612}{4}$

                                      =  $\frac{6.448}{4}$

                                      = 1.612 cm

Hence, the average reading of thickness of metal plate is found to be 1.612 cm

Therefore, the correct option is (b) 1.612 cm