NAT Mathematics MCQs

The increase is 210 - 120 = 90 units.
The percentage increase is 90/120 × 100 = 75%.

If 55% are girls, then 45% are boys.
Forty-five percent of 480 is 216.

A full pie chart is 360°.
Thus, 72/360 × 100 = 20%.

Use inclusion-exclusion: 80 + 60 - 20.
This gives 120 people who prefer at least one.

The total production is 210 units.
Dividing by 4 gives 52.5 units.

The sum is 40 and there are 5 values.
The mean is 40 ÷ 5 = 8.

A fair coin has two equally likely outcomes.
One favorable outcome out of two gives probability 1/2.

There are six equally likely die outcomes and only one is 5.
Thus, the probability is 1/6.

A standard deck has 26 red cards out of 52 total cards.
Thus, 26/52 = 1/2.

There are 4 aces among 52 cards.
Thus, the probability is 4/52 = 1/13.

The equally likely outcomes are HH, HT, TH, and TT.
Exactly one head occurs in HT and TH, giving 2/4 = 1/2.

There are 36 equally likely ordered outcomes.
Six outcomes have sum 7, so the probability is 6/36 = 1/6.