1. simplify
2. if x=2a+3/3a-2 express x-1 in terms of
3. xyz is an isosceles
yz=18cm. calcula
2x+1
an isosceles triangle inscribed in a circle, centre 0. xy=xz-20cm and
11. calculate to 3s. f: () the altitude of xyz (i) the diameter of the circle

Amachine that produces a special type of transistor (a component of computers) has a 2% defective rate. the production is considered a random process where each transistor is independent of the others. (a) what is the probability that the 10th transistor produced is the first with a defect? (b) what is the probability that the machine produces no defective transistors in a batch of 100? (c) on average, how many transistors would you expect to be produced before the first with a defect? what is the standard deviation? (d) another machine that also produces transistors has a 5% defective rate where each transistor is produced independent of the others. on average how many transistors would you expect to be produced with this machine before the first with a defect? what is the standard deviation? (e) based on your answers to parts (c) and (d), how does increasing the probability of an event a↵ect the mean and standard deviation of the wait time until success?