hey could anyone please answer this fast. with steps plss.
three coins are tossed simultaneously 200 times with the following frequencies od different outcomes.

number of tails :-    0      1     2     3 
frequency          :-   35   45   42   78

if the coins are tossed again the probability of at least two heads is...??

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At least two heads is - two heads or three heads.
In other words, in line with given data, it means 1 tail or 0 tails.
If we add the frequencies of 0 tails or 1 tail, it becomes 35+45 = 80.
Then, our probability would become 80/200 = 2/5 or 0.4
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