Explanation

- Average of 5 quantities = 6  

  So, total sum of 5 = 5 × 6 = 30  

- Average of 3 quantities = 4  

  So, total sum of 3 = 3 × 4 = 12  

- Sum of remaining 2 = 30 − 12 = 18  

- Average of remaining 2 = 18 ÷ 2 = 9

Explanation

Average of 5, 6, 7, and X = 10

Use the average formula:

(5 + 6 + 7 + X) / 4 = 10

Add the numbers:

(18 + X) / 4 = 10

Multiply both sides by 4:

18 + X = 40

Now solve for X:

X = 40 - 18 = 22

Explanation

To find the arithmetic mean between 4 and 6:

(4 + 6) / 2 = 10 / 2 = 5

Explanation

100x​×60=48
x×0.6=48
x=48/0.6​

$$x=80$$

Explanation

• A man is standing upside down with his face towards the south.
• Normally, if a person stands upright facing south, their left hand points east and right hand points west.
• When flipped upside down, the directions of their hands do not change relative to their body.

Thus, the left hand will still point east

Explanation

To find the length of the train, use the formula:

Speed = Distance / Time  

So, Distance = Speed × Time

Speed = 60 km/h = (60 × 1000) / 3600 = 16.67 m/s  

Time = 9 seconds

Now,  

Distance = 16.67 × 9 ≈ 150 meters

Explanation

A data bus is a set of parallel wires or lines that carry data in binary form.

- Each data line carries 1 bit of data.

- So, if a bus has 32 data lines, it can carry:

  32 lines × 1 bit per line = 32 bits

Explanation

To find the perimeter of a square when the area is 2304 m²:

1. Area of a square = side²  

   So, side = √2304 = 48 m

2. Perimeter = 4 × side = 4 × 48 = 192 m

Explanation

840 + 14 + 40 = 894

Explanation

Let the average after 17th innings = x

Then average after 16th innings = (x - 3)

Therefore 16 × (x - 3) + 87 = 17x

Therefore x = 39