Question

25.17
11. Three biased coins were tossed 800 times simultaneously. The outcomes are given in
the following table:
Outcome: No head One head Two head
Frequency: 120
280 x

If the probability of occurrence of two heads is thrice that of all heads, then the value
of x is
(a) 150
(b) 240
(c) 300
(d) 360​

Answer 1

Answer:

360 this is a answer OK why not