Read the given bar graph and answer the following :-
What is the average number of heart beats per minute for the five people named on the graph ?

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Solution

Finding the average number of heart beats per minute for the five people :
The given bar graph is showing the heart beats of some persons.
As we can see on the horizontal line name of different $5$ persons are given and on the vertical line heart beats (per minute) is given.
From the bar graph we can see that the heart beats of $5$ different persons are :
Shankar $=$ $45 H e a r t b e a t s$
Manish $=$ $70 H e a r t b e a t s$
Raman $=$ $50 H e a r t b e a t s$
Shambhu $=$ $60 H e a r t b e a t s$
Guddu $=$ $55 H e a r t b e a t s$
Therefore, the average number of heart beats per minute for the five people
$= \frac{S u m o f H e a r t b e a t a l l p e o p l e}{N u m b e r o f p e o p l e} = \frac{45 + 70 + 50 + 60 + 55}{5} = \frac{100 + 180}{5} = \frac{280}{5} = 56$
Hence, the average number of Heart beats per minute for the five people $= 56$

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