Exercise 16 A
Question 1
In the following events, match correctly to indicate whether the outcomes are possible, certain, or impossible.
(1) You will throw a 7 with a normal die.
(2) Your friend will call you tonight.
(3) A cat will give birth to puppies next year.
(4) Thursday will be the day after Wednesday next week.
(5) You will have cornflakes, samosas and toasts in your breakfast today.
(6) It will be winter in Australia when it is summer in India.
(7) You will be able to see a live dinosaur in the city zoo.
(8) You will be awarded a prize for your good performance.
Ans:
$\begin{array}{|c|c|c|c|c|c|c|c|}\hline 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 \\\hline b & a & b & c & a & c & b & a \\\hline\end{array}$
Question 2
Categorize each outcome as likely or unlikely.
(1) You will not get reservation in the train due to heavy Dusshra rush.
(2) Your friend will go to moon next month.
(3) Someone in your class will be absent next week.
(4) It will snow in mussorie in January.
(5) There will be floods in Delhi in March next year.
(6) You will become an army officer when you grow up.
$\begin{aligned}&\text { Ans. }\\&\begin{array}{|c|c|c|c|c|c|}\hline 1 & 2 & 3 & 4 & 5 & 6 \\\hline \mathbf{a} & \mathrm{b} & \mathrm{a} & \mathrm{a} & \mathrm{b} & \mathrm{a} \\\hline\end{array}\end{aligned}$
Question 3
Choose the likelihood which matches the outcome of each event:
(1) The school football team will win the local toumament.
(2) Mr. Shah will cut the grass on his lawn when it is snowing.
(3) While going to school, you will pass by a white car.
(4) The mountaineer will be hurt if he falls off the mountain.
(5) The number on the top face of an ordinary die will be an even number.
(6) The next baby to be born will be a female.
(7) The number on the top face of an ordinary die when rolled will be less than 7 .
(8) The Titanic will float back up to the top of the ocean.
(9) You will live for 100 years.
(10) A dog will have kittens.
(11) Monday will be the day after Tuesday next week.
(12) You will have a birthday next year.
(a) Impossible
(b) Unlikely
(c) Even Chance
(d) Likely
(c) Certain
$\begin{array}{|l|l|l|l|l|l|l|l|l|l|l|l|}\hline 1 & 2 & 3 & 4 & 5 & 6 & 7 & 8 & 9 & 10 & 11 & 12 \\\hline \mathrm{d} & \mathrm{b} & \mathrm{d} & \mathrm{d} & \mathrm{c} & \mathrm{c} &\mathrm{e} & \mathrm{a} & \mathrm{b} & \mathrm{a} & \mathrm{a} & \mathrm{e} \\\hline\end{array}$
Question 4
Multiple Choice Questions (MCQs)
The probability of being chosen for a team is $9 \%$. This event can be described as:
(a) likely
(b) certain
(c) having an even chance
(d) unlikely
Question 5
It will be a Thursday in one of the next 7 days.
The event is
(a) likely
(b) unlikely
(c) certain
(d) having an even chance.
Question 6
High Order Thinking Skills (HOTS)
A person with $\mathrm{O}, \mathrm{A}, \mathrm{B}$ or $\mathrm{AB}$ blood group can safely donate blood to a person with $\mathrm{AB}$ positive blood group.
Describe the event "a randomly chosen person could donate blood to a person with $\mathrm{AB}$ positive blood group" as certain or likely or unlikely or impossible.- Certain
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