To make one cheese sandwich, tina uses one bread roll and two cheese slices.
pack of 15 bread rolls £2.23. pack of 20 cheese slices £1.91 she is going to buy enough packs to have exactly twice as many cheese slices as bread rolls make more than 100 cheese sandwiches. work out the least amount she can spend.

The answer is :

£71.47

a

step-by-step explanation:

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %