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3 distinct coins are tossed together. Find the probability of getting---
a ) at least two heads.
b) at most two heads.
Please Elaborate .
 

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https://www.meritnation.com/ask-answer/question/three-unbiased-coins-are-tossed-what-is-the-probability-of-g/probability/481479

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Total no. of outcome = HHH, HHT, HTH, HTT, THH, THT, TTH, and TTT.= 8

1.At least two heads = { HHH, HHT, HTH, THH, } = 4
Required Probability = 4/8 = 1/2

2. At most one head = {HHH, HHT, HTH, HTT, THH, THT, TTH} = 7
Required Probability = 7/8

Hope It Helps!!!
  • 2
total outcomes=8
TTH; THT; TTT; THH; HTT; 
HTH; HHT; HHH
 
  1. AT LEAST TWO HEADS 
POSSIBLE OUTCOMES=THH ; HHH ; HTH ; HHT
P(AT LEAST TWO HEADS)=4/8                                            =1/2​
2. AT MOST TWO HEADS 

POSSIBLE OUTCOMES=THH ; THT ; TTT ; TTH ;
HTH ; HHT ; HTT
P(AT MOST TWO HEADS) = 7/8

HOPE THIS HELPS
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