Question

Sheila either walks to school or cycles, the probability that she walks it 0.65.

Answer 1

In this question,  the probability that Sheila walks is 0.65 and if she walks, which mean the probability to take cycle is 0.35. The probability that shell be late if walking is 0.4 and if she cycles the probability that shell be late is 0.1

The probability that she will be late:
0.65*0.4 + 0.35*0.1= 0.26+ 0.035= 0.295

The probability that she will not be late:
1-0.295= 0.705= 70.5%