A man took 1.5 hours to drive 108 km from London to Brighton. He used 11.25 litres of petrol. Complete these sentences. (a) His average speed was
km/h.

(b) His petrol consumption was
km/litre.

For part of the journey he drove at an average speed of 104 km/h for 50 minutes.

(c) For the rest of the journey he drove for 40 minutes
at an average speed of
km/h.

85.560%

step-by-step explanation:

conditional probability is defined as:

p(a|b) = p(a∩b) / p(b)

in other words, the probability that a occurs, given that b has occurred = the probability that both a and b occur / the probability that b occurs.

in this example:

p(turns 64 | turns 44) = p(turns 64 & turns 44) / p(turns 44).

if someone turns 64, they must have already turned 44, so:

p(turns 64 | turns 44) = p(turns 64) / p(turns 44)

on page 42, we see that of the original 100,000, 94944 turn 44, and 81234 turn 64.   therefore:

p(turns 64 | turns 44) = 81234 / 94944

p(turns 64 | turns 44) = 0.85560

answer: 3.26019516

step-by-step explanation: