Email
Chat with tutor
logo

Ask Questions, Get Answers

X
 
Questions  >>  CBSE XI  >>  Math  >>  Probability
Answer
Comment
Share
Q)

True-or-False : The probability that a person visiting a zoo will see the giraffee is 0.72,the probability that he will see the bears is 0.84 and the probability that he will see both is 0.52.

$\begin{array}{1 1}(A)\;\text{True}\\(B)\;\text{False}\end{array} $

1 Answer

Comment
A)
Toolbox:
  • $P(A \cup B)=P(A)+P(B)-P(A \cap B)$
Step 1:
Let us consider that
Probability of a person visiting a zoo and will see a giraffee=P(A)
Probability of a person visiting a zoo and will see a bear=P(B)
Probability of a person visiting both =P$(A\cup B)$
$P(A \cup B)=P(A)+P(B)-P(A \cap B)$
$0.52=0.72+0.84-P(A \cap B)$
Step 2:
$\therefore P(A \cap B)=0.72+0.84-0.52$
$\Rightarrow P(A \cap B)=1.04$
But $P(A \cup B)$ cannot be lesser than $P(A \cap B)$
$\therefore$ The given statement is False.
Help Clay6 to be free
Clay6 needs your help to survive. We have roughly 7 lakh students visiting us monthly. We want to keep our services free and improve with prompt help and advanced solutions by adding more teachers and infrastructure.

A small donation from you will help us reach that goal faster. Talk to your parents, teachers and school and spread the word about clay6. You can pay online or send a cheque.

Thanks for your support.
Continue
Please choose your payment mode to continue
Home Ask Homework Questions
Your payment for is successful.
Continue
Clay6 tutors use Telegram* chat app to help students with their questions and doubts.
Do you have the Telegram chat app installed?
Already installed Install now
*Telegram is a chat app like WhatsApp / Facebook Messenger / Skype.
...