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*********AVERAGES********
| Average:It is defined as the sum of a list of numbers divided by the total numbers of numbers present in the list. |
It is represented as average= (sum of numbers/total numbers)
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********CHECK OUT SOLVED EXAMPLES********
| 1.Find the average marks of Prakash in 5 subjects as marks of each Subjects given below: Maths:99 Eng:98 Sci:98 S.St:98 Hindi:95
Ans:Average = (99+98+98+95+98)/5 = (196+194+98)/5 = (390 +98)/5= 488/5=97.6
check the answer!!! |
2.Find the sum of age of thirty students of classvi where average age is 11 years.
Ans:Sum of age=Average*total no.of students=11*30=330
check the answer!!! |
| 3.In Class vi section A has 35 students which has 42 kg average weight of students. Mohan got new admission in class vi section A which has 38.50kg.Find the average weight including Mohan.
Ans: Including Mohan total number of students=36
Total Weight of the student = (35*42+38.50)=1508.50 Average=1508.50/36=41.90 check the answer!!! |
4.Find mean temperature of seven days as temperature in celsius
Mon Tue Wed Thrus Fri Sat Sun
35.5 37 34.5 36.5 35.5 34.5 33
Ans:
(35.5 + 37+ 34.5 +36.5 + 35.5+ 34.5+ 33)/7
= (72.5+71+70+33)/7=(174+72.5)/7=247.5/7=35.36 check the answer!!!
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********TRY BY YOURSELF********
Q1: Find the average of following:
WeeK: Mon Tue Wed Thrus Fri Sat Sun
Temperature: 36.5 37 36.5 36.5 38 39 33
No. of week : 1st week 2nd week 3rd week 4th week
Costof expenditure: Rs.4500 Rs.4567 Rs5678 Rs9800
Section: A B C D E
No. of students: 36 38 39 40 34 37
d)At a particular city the number of tourists come ,January to june is given below.MONTHS: Jan Feb Mar Apr May JuneQ1:The marks secured by 9 students in Mathematics are 20,30,23,19,21,30,18,17,19 out of 30.
No of tourists: 13,00 45,00 23,00 24,00 35,00 40,00