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

8919 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

What's the key to solving simultaneous equations?


Q: How to solve the simultaneous equations 3x+2y=7 and 5x+y=14


Solve the simultaneous equations. 2x + y = 18 . x - y = 6


Rectangle ABCD has sides 2x+5 and x+2 with rectangle EFGH of sides x+3 and x cut out of it. The total area of shape ABCD is 5cm^2. Show that 0 = x^2 + 6x +5 [5 Marks]


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences