CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon


Question

The probability of getting at least one tail , when a coin is thrown 4 times is


  1. 116

  2. 14

  3. 18

  4. 1516


Solution

The correct option is D

1516


Sample space
=⎢ ⎢ ⎢ ⎢ ⎢ ⎢TTHT,TTTH,TTTT,TTHHTHHT,THTH,THTT,THHHHTHT,HTTH,HTTT,HTHHHHHT,HHTH,HHTT,HHHH⎥ ⎥ ⎥ ⎥ ⎥ ⎥
Total number of outcomes = 16
Favourable outcomes for getting all heads = { HHHH }     
Number of favourable outcomes = 1                             
Probability of getting all heads = Number of favourable outcomesTotal number of outcomes=116
P(atleast one tail) = 1 - P (Heads only)
 P(Atleast one tail) = 1116
                                  = 1516

 

flag
 Suggest corrections
thumbs-up
 
0 Upvotes


Similar questions
View More...



footer-image