Experimental Probability

Q.

A dice is thrown once. Find the probability of getting a number less than 3.

1. 
2. 
3. 
4. 

Q. A bag contains $4$ white and $6$ black balls, - all of the same shape and same size. A ball is drawn from the bag without looking into the bag. Find the probability that the ball drawn is:

$\left(ii\right)$ A white ball

Q. In a survey of 200 ladies, it was found that 82 like coffee while 118 dislike it. From these ladies, one is choosen at random. What is the probability that the chosen lady dislikes coffee?

1. $\frac{59}{100}$
2. $\frac{100}{41}$
3. $\frac{41}{100}$
4. $\frac{100}{59}$

Q. Question 7 (ii)
To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.
$$\begin{array}{cc}Opinion& Numberofstudents\\ like& 135\\ dislike& 65\end{array}$$
Find the probability that a student chosen at random
(ii) does not like it

Q. What is the probability of choosing a vowel from the alphabet?

1. $\frac{21}{26}$
2. $\frac{5}{26}$
3. $\frac{1}{21}$
4. None of these

Q. The number of visitors in a children's park on a particular day is given. Find the liklihood that the visitor is from the age group 16 to 30.

1. 40%
2. 15%
3. 12%
4. 20%

Q. A coin is flipped to decide which team starts the game. What is the probability that your team will start ?

Q. A coin is tossed two times whose outcomes are given as HH, TT, HH, TT. Find the number of incorrect entries.

1. 2

Q.

A survey was conducted to find out which brands of computer mouse different people used. The data collected from a 100 people is as follows:

$$\begin{array}{cc}\text{Brand}& \text{Frequency}\\ \text{Logitech}& 32\\ \text{Microsoft}& 26\\ \text{Dell}& 23\\ \text{Others}& 19\end{array}$$

Find the probability that a person
(i) uses Dell or Microsoft
(ii) does not use either Logitech, Dell or Microsoft. [3 MARKS]

Q. If you think of a number from the first 28 natural numbers, what is the probability that the number will be divisible by 6?

1. $\frac{1}{5}$
2. $\frac{1}{6}$
3. $\frac{1}{4}$
4. $\frac{1}{7}$

Q. The probability of raining in a city on a particular day is 0.24. What is the probability that there won't be any rainfall in the city on that day?

1. 0.76
2. 0.26
3. 1
4. 0.06

Q. What is the probability when two unbiased dice are rolled to get their product divisible by 3

Q. There are 5 green, 6 black and 7 white balls in a bag. A ball is drawn at random from the bag. Find the probability that it is not white.

Q. A box contains two pair of socks of two colours (black and white). I have picked out a white sock. I pick out one more with my eyes closed. What is the probability that I will make a pair?

Q.

	Age	Age
Gender	Under $40$	$40$ or older	Total
Male	$12$	$2$	$14$
Female	$8$	$3$	$11$
Total	$20$	$5$	$25$

The table above shows the distribution of age and gender for $25$ people who entered a contest. If the contest winner will be selected at random, what is the probability that the winner will be either a female under age $40$ or a male age $40$ or older?

1. $\frac{4}{25}$
2. $\frac{10}{25}$
3. $\frac{11}{25}$
4. $\frac{16}{25}$

Q. A coin is flipped to decide which team starts the game. What is the probability that your team will start ?

Q. If you think of a number from the first 28 natural numbers, what is the probability that the number will be divisible by 6?

1. $\frac{1}{5}$
2. $\frac{1}{6}$
3. $\frac{1}{4}$
4. $\frac{1}{7}$

Q. A number is taken at random from the number 1 to 100, the probability that the number is divisible by '7' is_______.

1. 33/100
2. 28/100
3. 14/100
4. 1/5

Q. In a stall there are some balloons and balls. The data of them is shown below.If a balloon is picked randomly, then the chance of having it in blue is
\begin{tabular}{|l|l|l|} \hline & Balloons & Balls \\ \hline Blue & 6 & 8 \\ \hline Red & 4 & 10 \\ \hline \end{tabular}

Q. A box contains two pairs of socks of two colours (black and white). I have picked out a white sock first and latter if I pick one more with my eyes closed, what is the probability that it will make a pair?

1. $\frac{1}{3}$
2. $\frac{1}{2}$
3. $\frac{1}{4}$
4. $\frac{1}{5}$

Q.

A bag contains $4$ white and $6$ black balls, - all of the same shape and same size. A ball is drawn from the bag without looking into the bag. Find the probability that the ball drawn is:

$\left(i\right)$ A black ball

Q. A coin is tossed two times whose outcomes are given as HH, TT, HH, TT. Find the number of incorrect entries.

1. 2

Q. A number $243$ is represented as F$3$ in a number system. Which number system is used to represent $243$ as F$3$?

1. Octal
2. Hexadecimal
3. Gray code
4. Binary

Q. A box contains two pairs of socks of two colours (black and white). I have picked out a white sock first and latter if I pick one more with my eyes closed, what is the probability that it will make a pair?

1. $\frac{1}{2}$
2. $\frac{1}{4}$
3. $\frac{1}{3}$
4. $\frac{1}{5}$