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Data Handling — Chapter Test

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Q1
The probability of a certain event is ___ ?
A certain event has probability 1.
Q2
In a histogram the bars have ___ ?
Histogram bars touch each other.
Q3
A full pie chart represents ___ ?
A full circle is 360°.
Q4
Probability values range from 0 to ___ ?
Probability ranges from 0 to 1.
Q5
The class interval 30–40 has size ___ ?
40 − 30 = 10.
Q6
What pie-chart angle represents 25% of the data?
(25/100) × 360 = 90°.
Q7
What pie-chart angle represents 50% of the data?
(50/100) × 360 = 180°.
Q8
What is the probability of a head on a fair coin?
1 head out of 2 outcomes, so ½.
Q9
What is the probability of rolling a 3 on a fair die?
1 out of 6, so 1/6.
Q10
What is the probability of an even number on a fair die?
2, 4, 6 give 3/6 = ½.
Q11
In a class of 40, 10 like cricket. What pie-chart angle represents cricket?
(10/40) × 360 = 90°.
Q12
A bag has 4 red and 6 blue balls. What is the probability of drawing a red ball?
4 red out of 10, so 4/10 = 2/5.
Q13
A pie-chart sector is 120°. What fraction of the total is it?
120 ÷ 360 = ⅓.
Q14
A fair die is rolled. What is the probability of a number greater than 4?
5 and 6 give 2/6 = ⅓.
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