أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
If two coins are tossed the possible outcomes are HH,HT,TH,TT. Here H denotes head and T denotes tail. At most 2 heads means 2 or less than 2 Heads in a outcome. So here the probability of at most 2 heads is 3/4
