Two coins are tossed 1000 times and the outcomes are recorded as given below :

Now , if two coins are tossed at random , what is the probability at most one head ?

Options

A. `(3)/(4)`
B. `(4)/(5)`
C. `(1)/(4)`
D. `(1)/(5)`

Answer

B

Explanation

Total number of throws = 1000.
Number of times at most 1 head appears
= (number of time 0 head appears) + (number of times 1 head appears)
= (250 + 550) = 800 .
Required probability = `(800)/(1000) = (4)/(5)` .