Скачать или смотреть Math 🔥| Class-10 | Unit-15 | Probability | Exercise 15.1 (Full Solution) 👌 | SANJU JANGRA SIR

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Exercise 15.1
Q1. Complete the following statements:
Probability of an event E + Probability of event ‘not E’ =…..
The probability of event that cannot happen is…………… Such as event called …......
The probability of an event that is certain to happen is ………. Such as event called….....
The sum of probabilities of all elementary events of an experiment is ……….
The probability of an event is greater than equal to……………… and less than equal to……

Q2. The following experiments have equally likely outcomes? Explain.
i) A driver attempts to start a car. The car starts or does not start.
ii) A player attempts to shoot a basketball. She/he shoots or misses the shot.
iii) A trial is made to answer a true false question. The answer is right or wrong.
iv) A baby is born. It is a boy or a girl.

Q3. Why is tossing a coin considered to be a fair way of deciding which team should get the ball at the beginning of a football game?

Q4. Which of following cannot be the probability of an event?

Q5. If P(E) = 0.05, what is probability of ‘not E’?

Q6. A bag contains lemon flavored candies only. Malini takes out one candy without looking into the bag. What is the probability that she takes out:
i) An orange flavored candy?
ii) A lemon-flavored candy?
Q7. it is given that in a group of 3 students, the probability of 2 students not having same birthday is 0.992. what is the probability that the 2 students have the same birthday.

Q8. A bag contains 3 red balls and 5 black balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is :
(i) Red
ii) Not red

Q9. A box contains 5 red marbles, 8 white marbles and 4 green marbles. One marble is taken out-of-the-box at random. what is the probability that marble taken out will be:
i) Red
ii) White
iii) Not Green

Q10. A Piggy Bank contains hundred 50 p coins, fifty ₹ 1 coins, twenty ₹ 2 coins and ten ₹ 5 coins. If it is equally likely that one of the coins will fall out when the bank is it turned upside down, what is the probability that the coin:
i) will be 50p coin?
ii) will not be a ₹ 5 coin?

Q11. Gopi buys a fish from a shop for his aquarium. The shopkeeper takes out one fish at random from a tank containing 5 male fish and 8 female fish. what is the probability that the fish taken out is a male fish?

Q12. A game of chance consisted of spinning and arrow which comes to rest pointing at one of the numbers 1, 2, 3, 4, 5, 6, 7, 8 and these are equally likely outcomes. what is the probability that it will be point at:
(i)8?
ii) An odd number
iii) A number greater than two
iv) A number less than 9

Q13 : A die is thrown once. Find the probability of getting:
(i)a prime number;
(ii) a number lying between 2 and 6;
(iii) an odd number.

Q14 : One card is drawn from a well-shuffled deck of 52 cards. Find the probability of getting
(i) a king of red color
(ii) a face card
(iii) a red face card
(iv) the jack of hearts
(v) a spade
(vi) the queen of diamonds

Q15 : Five cards--the ten, jack, queen, king and ace of diamonds, are well-shuffled with their face downwards. One card is then picked up at random.
(i)What is the probability that the card is the queen?
(ii) If the queen is drawn and put aside, what is the probability that the second card picked up is
(a) an ace?
(b) a queen?

Q16 : 12 defective pens are accidentally mixed with 132 good ones. It is not possible to just look at a pen and tell whether or not it is defective. One pen is taken out at random from this lot. Determine the probability that the pen taken out is a good one.

Q17 : A lot of 20 bulbs contain 4 defective ones. One bulb is drawn at random from the lot.
(i)What is the probability that this bulb is defective?
(ii) Suppose the bulb drawn in (i) is not defective and is not replaced. Now one bulb is drawn at random from the rest. What is the probability that this bulb is not defective?

Q18 : A box contains 90 discs which are numbered from 1 to 90. If one disc is drawn at random from the box, find the probability that it bears
(i) a two-digit number
(ii) a perfect square number
(iii) a number divisible by 5.

and much more ....