Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  CBSE XI  >>  Math  >>  Probability
0 votes

Determine the probability P,for each of the following events.Atleast one head in two tosses of a fair coin.

$\begin{array}{1 1}(A)\;\large\frac{3}{4}\\(B)\;\large\frac{2}{5}\\(C)\;\large\frac{3}{7}\\(D)\;\large\frac{4}{5}\end{array} $

Can you answer this question?

1 Answer

0 votes
Step 1:
Atleast one head in two tosses of a fair coin.
$\therefore$ Sample space of two tosses of a fair coin =$\{HH,HT,TH,TT\}$
Atleast one head $n(E)=\{HH,HT,TH\}$
Step 2:
$\therefore$ Probability =$\large\frac{n(E)}{n(S)}$
$\Rightarrow \large\frac{3}{4}$
Hence (A) is the correct answer.
answered Jul 8, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App