The probability of getting heads on a biased coin is 0.8. You flip the coin twice. What is the probability of getting one each of heads and tails?

Step 1: Calculate probability of getting tails by subtracting 1-0.8 = 0.2.Step 2: Calculate probability of getting heads then tails by multiplying 0.80.2 = 0.16.Step 3: Calculate probability of getting tails then heads by multiplying 0.20.8 = 0.16. Step 4: Calculate total probability of getting one each of heads and tails by adding 0.16+0.16=0.32 // OR recognise that P(heads then tails)=P(tails then heads) and calculate total probability by multiplying 0.16*2 = 0.32.You can also use a tree diagram to help illustrate the different possible outcomes.

NR
Answered by Nadya R. Maths tutor

10122 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How would you solve the simultaneous equations y=x+1 and y=4x-2


How do I revise for my Maths GCSE exam?


Solve these simultaneous equations 2y+x=8, 1+y=2x.


Write 825 as a product of its prime factors.


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning