The time it takes for climbers to reach the highest point of a mountain is normally distributed with a standard deviation of 0.75 hours. if a sample of 35 people is drawn randomly from the population, what would be the standard error of the mean of the sample? 0.02 0.13 0.17 0.40 0.76

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.