| GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012: Average Oct 18th 2012, 08:55 | GyanCentral - The hub for engineering and law students - IIT-JEE, AIEEE, BITSAT, CLAT, AILET - 2012 | | The source for all engineering and legal education news in India | | | Average Oct 18th 2012, 08:29 Definition: Average refers to the sum of numbers divided by n. Also called the mean average. Sums of data divided by the number of items in the data will give the mean average. The mean average is used quite regularly to determine final math marks over a term or semester. Averages are often used in sports: batting averages which means number of hits to number of times at bat. Gas mileage is determined by using averages. Formula: Mean = sum of elements / number of elements = a1+a2+a3+.....+an/n Example: To find the mean of 3,5,7. Step 1: Find the sum of the numbers. 3+5+7 = 15 Step 2: Calculate the total number. there are 3 numbers. Step 3: Finding mean. 15/3 = 5 Examples: If the average temperature this week was 70 degrees, the temperature would have been taken each day over the 7 days. Those temperatures would be added up and divided by 7 to determine the average temperature. Q 1. Hiresh plays basketball on a team. He has played three games so far. In the first game, he scored 10 points. In the second game, he scored 14 points. In the third game, he scored 6 points. What is Hiresh's average points per game? Solution : 10 + 14 + 6 = 30 points 30 / 3 games = 10 points per game on average. Answer : 10 Q2. Mandy earns money by delivering groceries. She earned $4 on Monday, $7 on Tuesday, $5 on Wednesday, $4 on thursday, and $5 on Friday. What is the average amount of money Mandy earned per day? Solution: Rs 400 + Rs 700 + Rs 500 + Rs 400 + Rs 500 = Rs 2500 Rs 2500 / 5 days = Rs 500 per day on average Answer : Rs 500 per day |  | | |  |  |
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