Practice NAT questions with answers and explanations.
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If 55% are girls, then 45% are boys.
Forty-five percent of 480 is 216.
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A full pie chart is 360°.
Thus, 72/360 × 100 = 20%.
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Use inclusion-exclusion: 80 + 60 - 20.
This gives 120 people who prefer at least one.
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The total production is 210 units.
Dividing by 4 gives 52.5 units.
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The sum is 40 and there are 5 values.
The mean is 40 ÷ 5 = 8.
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The median is the middle value in ordered data.
The third of five values is 9.
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There are six equally likely die outcomes and only one is 5.
Thus, the probability is 1/6.
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A standard deck has 26 red cards out of 52 total cards.
Thus, 26/52 = 1/2.
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There are 4 aces among 52 cards.
Thus, the probability is 4/52 = 1/13.
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The equally likely outcomes are HH, HT, TH, and TT.
Exactly one head occurs in HT and TH, giving 2/4 = 1/2.
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There are 36 equally likely ordered outcomes.
Six outcomes have sum 7, so the probability is 6/36 = 1/6.
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Slope is change in y divided by change in x.
Thus, (10 - 2)/(5 - 1) = 8/4 = 2.
