Answer:
A
Step-by-step explanation:
Answer-1 Range= Highest value - Lowest value
So,
85-79=6 is the range of data.
Answer-2 These four numbers are above 81 those are 82,83,84,85
So boys above 81 = 9
Answer-3. 4 were having pulse rate 83.
It is 50 cm squared hxb/2=a
-1/112