Probability ncert solutions Chapter 15 Exercise 15.1 Question 2
2. Which of the following experiments have equally likely outcomes? Explain.
(i) A driver attempts to start a car. The car starts or does not start.
This experiment does not have equally likely outcomes. The probability of outcomes depends on the condition of car.
(ii) A player attempts to shoot a basketball. She/he shoots or misses the shot.
This experiment does not have equally likely outcomes. The probability of outcomes depends on the skills of player.
(iii)
A trial is made to answer a true-false question. The answer is right or wrong.
This experiment has equally likely outcomes because answer is either true or false and any person would answer either true or false. The probability of giving right answer is 0.5 and also, the probability of giving wrong answer is 0.5.
(iv)
A baby is born. It is a boy or a girl.
It has equally likely outcomes. The probability that baby is going to be boy is 0.5 and the probability that baby is going to be girl is also 0.5.
D says
If the car is not in good condition, the car does not start. We have that possibility. Why can’t we say that is equally likely??
Naman says
But sometimes it can start and again stop
G says
3rd question also depeands on the intelligent of the person may be he write true. So shooting of the basketball also same depends on the abilities of the what is the difference between those questions.
Kakali Datta says
Write or wrong answer depends on the skillset of student. If he is a “feltu” he won’t get marks else he must be lucky enough.
Also, gender of child depends on the chromosome of male gamete.
Therefore, maths is a blind, deaf and dumb man in a dark room searching for a black cat which is not present!!
Mr Z says
There are equal chances that there will form an XX gamete or XY gamete. So the chances are equal