Question

three coins are tossed 250 times 

outcomes 3heads   2heads  1head  no head
frequency 38             32         87       43  

find the pobability of getting
1. less than  two heads
2. 2 tails

Answer 1

probability of getting less than 2 heads is - 87+43/250=130/250=13/25.
probability of getting 2 tails is equal to getting only 1 head,i.e.=87/250.