Question

a coin is tossed 500 times and head appeared 300 times. find the sum of the probabaility of getting a head a nd the probability of getting a tail .

Answer 1

Total no. of tosses = 500
Total possible outcomes = 500
No. of times head appears = 300
no. of favorable outcomes = 300
$probabilityofgettingahead=\frac{no.offavorableoutcomes}{totalpos\mathrm{sible}\mathrm{outcomes}}=\frac{300}{500}=\frac{3}{5}$

no. of times tail appears = 500 - 300 = 200
no. of favorable outcomes = 200
$probabilityofgettingatail=\frac{200}{500}=\frac{2}{5}$

$requiredsum=\frac{3}{5}+\frac{2}{5}=\frac{5}{5}=1$