Question

Five friends, Lata, Mala, Shaila, Rohit and Ali each tried out two of the five different brands of batteries to check which brand lasted the longest. The data collected is shown in the below photo.

If they had to choose the brand with the longest expected life based on the above experiments, they should choose _________.

Answer 1

Answer:

I think the answer is P, the battery tested by Lata.

Explanation:

Answer 2

Answer:

The friends should choose battery Q as per the data of the given experiment.

Explanation:

The longest expected life of the battery can be ascertained on the basis of the experiment result of two different users.

The average life of P brand battery = $\frac{7+3}{2} = \frac{10}{2}$ = 5.

The average life of Q brand battery = $\frac{5+6}{2} = \frac{11}{2}$ = 5.5 .

The average life of R brand battery = $\frac{4+5}{2} = \frac{9}{2}$ = 4.5 .

The average life of S brand battery =  $\frac{4+5}{2} = \frac{9}{2}$ = 4.5 .

The average life of T brand battery = $\frac{4+5}{2} = \frac{9}{2}$ = 4.5.

Thus, battery Q last the longest. i.e. for 5.5 days out of the batteries of 5 brands.

As per the experiment results the friends should choose battery of brand Q.

#SPJ3