Question

. A can do a piece of work in 7 days of 9 hours each where as B can do the same

work in 6 days of 7 hours each. How long will they take to do the work

2 together, working 8  hours a day? 5

1 2 (1) 2 days (2) 3 days (3) 3  days (4) 4  days​

Answer 1

Answer:

it is claimed by a racer bike manufacturing company that the race bikes are driven on a average of more than 12,000 kilometres on yearly basis .To the test the company's claim 100 randomly drawn racer bike owners are asked to maintain a record of total distance they travel. Will you favour this companys claim if the randomly selected sample exibit an average of 13,200 kilometres and a standard deviation of 3900 kilometres? Use P value to conclude your answervwith 5% level of significance