Explanation

Explanation

Decrease in temperature = Day temperature − Midnight temperature

Explanation

Average = (2 + 4 + 6 + x) / 4 = 3

12 + x = 12

x = 0

Last verified on 12-10-2026

Explanation

The negative numbers and positive numbers balance each other.

-10 - 40 = -50

20 + 30 = 50

-50 and +50 makes 0, so average is 0.

Last verified on 12-10-2026

Explanation

Average = (25+35+45)/3 = 105/3 = 35

Last verified on 11-10-2026

Explanation

Step 1: Find the total marks.

Total = Average × Number of students

$40 times 5 = 200$

Step 2: Subtract 60 marks.

$200 - 60 = 140$

Step 3: Calculate the new average.

140/4=35

Explanation

Explanation

Given:

Average of 5 numbers = 4

2 is added to each number.

Formula:

Average = Sum of numbers ÷ Number of numbers

Original Sum = 4 × 5 = 20

After adding 2 to all 5 numbers:

New Sum = 20 + (2 × 5) = 30

New Average = 30 ÷ 5 = 6

Explanation

Given:

• Total books = 24,375
• Books per shelf = 375

Formula:

Number of shelves = Total books/ Books per shelf 

24375/375

=65​

Explanation

Average=Sum of numbersNumber of numbers​

So:

Sum =Average× Number of numbers

= 33 x 3 

= 99
​