Grab the coin

Probability Level 1

A fair coin is tossed repeatedly.If Tail appears on first four tosses then the probability of head appearing on fifth toss equals

1÷32 32÷32 1÷2 3÷7

Shaikh Akhter by shaikh akhter , 24, India

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6 solutions

Shaikh Akhter
Apr 16, 2014

Required probability=1÷2,because the event to occur in fifth toss is independent event disregard the results of previousv events.

6 Helpful 0 Interesting 0 Brilliant 0 Confused

It ain't matter how many times you toss the coin, the probability will always remain the same.

Shreyansh Vats - 7 years, 1 month ago

Yes, doesn't matter how many times tail has appeared before, the probability will be 1/2

Gabriel Laurentino - 7 years, 1 month ago

Too simple!!!

Smit Kiri - 7 years, 1 month ago

Log in to reply

That's why it's level 1!

Sagnik Saha - 6 years, 10 months ago

:3

jeremiah atenta - 7 years, 1 month ago
Ashwin Upadhyay
Aug 6, 2014

good question........................

0 Helpful 0 Interesting 0 Brilliant 0 Confused
Hassan Raza
Aug 4, 2014

A c o i n h a s t w o s i d e s S o , t h e p r o b a b i l i t y o f a p p e a r i n g o n e h e a d o r o n t a i l i s 1 2 A\quad coin\quad has\quad two\quad sides\\ So,\quad the\quad probability\quad of\quad appearing\quad one\quad head\quad or\quad on\quad tail\quad is\\ \frac { 1 }{ 2 }

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Krishna Garg
Jul 7, 2014

Whether fist 4 times tail appearing but chances of 5th time are HEAD or TAIL that is 50 5 or 1/2 Ans.

K.K.GARG,India

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Charity Aghahowa
Jun 29, 2014

The fifth result is going to be the normal probability 1÷ 2 because the toss is independent regardless of the 1st, 2nd, 3rd and 4th tosses!!!

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Sophie Crane
Apr 19, 2014

Gambler's Fallacy!!!

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