If the arithmetic mean of seventy-five numbers is calculated, it is 35. if each number is increased by 5, then mean of new number is :
Select:
A) 30 B) 40 C) 70 D) 90 E) 80
Solution   A.M of 75 numbers = 35.   sum of 75 numbers = (75 × 35) = 2625.   total increase = (75 × 5) = 375 .   increased sum = (2625 + 375)= 
<gadget id="calculator">(2625 + 375)</gadget>
<output>3_000</output>
3000.   increased average= 3000/75= 
<gadget id="calculator">3000/75</gadget>
<output>40</output>
40 Answer 40
<result>B</result>
If the arithmetic mean of seventy-five numbers is calculated, it is 35. if each number is increased by 5, then mean of new number is :