Statistics - Probability - Independent and Mutually Exclusive Events and Probability Distribution

Probability in A-Level Maths includes independent events, mutually exclusive events and probability distribution. In terms of probability distribution, this video looks at both discrete random variables and continuous variables where the total area totals 1.

[ozeozeoze]

how did you get from a+1/2(2a)=1 to 2a=1??? because dont you multiply the 1/2 over to 1 which makes it 0.5 and then its 3a=0.5?

[papiharpy]

For 12:07 would it not have been easier to use trapezium rule where 1/2(a+b) = 1