Total cartons = 5 + 8 = 13
Total cost = 105 + 155 = 260
Total items = 13 x 5 = 65
Average price per item = Total cost / Total items = 260 / 65 = 4
Formula: Total amount = Average × Number of students
Calculation: 20 × 30 = 600
So, the total pocket money of the class is Rs. 600.
To find the books sold in the 4th week:
Total books = 4320
Total angle in pie chart = 360°
Books sold in 4th week = 42/360 × 4320
= 4320 × 42/360
= 4320 × 7/60
= 504
Formula: Sum = Average × Number of quantities
Calculation: 215 × 40 = 8600
The sum of the values is calculated as the average multiplied by the number of values: 30 * 4 = 120.
Therefore, the sum of the values is 120.
12 karat (12K) gold contains 50% gold.
The karat system measures gold purity,
Where 24 karat (24K) is considered 100% pure gold,
So 12 karat gold is 12/24, or half, pure gold.
Given ratio: 5:7
To decrease 91 in the ratio 5:7, let's calculate the new value:
New value = 91 × 5/7
= 65
Given:
Average = 225
Number of quantities = 45
Sum of quantities = Average * Number of quantities
= 225 * 45
= 10125
The arithmetic mean (average) is calculated by dividing the sum of the numbers by the count of numbers.
Mean = 77
Count of numbers = 13
Sum of numbers = Mean × Count of numbers
= 77 × 13
= 1001
