MY CART (5)

Use Coupon: CART20 and get 20% off on all online Study Material

ITEM
DETAILS
MRP
DISCOUNT
FINAL PRICE
Total Price: Rs.

There are no items in this cart.
Continue Shopping
Menu
Mayank Bhardwaj Grade: 12
        

If at least 1 child in a family with 3 children is a boy find the prob that family have 2 of the children are boys


1) 3/7


2) 4/7


3) 3/8


4) 1/3

7 years ago

Answers : (2)

Badiuddin askIITians.ismu Expert
147 Points
										

Dear Mayank


Given at least 1 child in a family with 3 children is a boy


so event  1 boy in a family  ,2 boy in a family ,  3 boy in a fimily are equally likily event


 so chances of happening any event fou of three is 1/3


 so prob that family have 2 of the children are boys =1/3


Please feel free to post as many doubts on our discussion forum as you can.
If you find any question Difficult to understand - post it here and we will get you
the answer and detailed  solution very  quickly.

 We are all IITians and here to help you in your IIT JEE preparation.

All the best.
 
Regards,
Askiitians Experts
Badiuddin

7 years ago
swetha viriyala
31 Points
										

There is a probability that the family contains 1 boy,2boys or 3 boys.... so chance of each event selection is 1/3 but its not the final answer..


if one boy is there then chance of selecting that 1 boy from 3 children is 1/3 


if 2 boys are there then chance of selecting one boy among them is 2/3


if 3 boys are there then chance of selecting 1 boy is 3/3 i.e., 1


Now, required probability is 1/3 * 1 / 1/3 * 1 + 1/3 * 2/3 +1/3 * 1/3 = 1/2 


This is the final answer required. 

6 years ago
Think You Can Provide A Better Answer ?
Answer & Earn Cool Goodies
  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: Rs. 15,900
  • View Details
Get extra Rs. 6,837 off
USE CODE: JYOTI
Get extra Rs. 1,003 off
USE CODE: JYOTI

Ask Experts

Have any Question? Ask Experts

Post Question

 
 
Answer ‘n’ Earn
Attractive Gift
Vouchers
To Win!!! Click Here for details