The record of a weather station shows that out of the past 250 consecutive days, its weather forecast were correct 175 times. What is the probability that on a given day it was correcrt?

The record of weather station shows that out of the part 250 consecutive days its whether forecast were correct 175 times . What is the probability that it was not correct on a given data ?

A factory has two machines A and B. Past record shows that machine A produced 60% of the items of output and machine B produced 40% of the items. Further, 2% ol the items produced by machine A and 1% produced by machine B were defective. All the items are put into one stockpile and then one item is chosen at random from this and is found to be defective. What is the probability that it was produced by machine B:

Assume that a factory has two machines. Past records show that machine I produces 20% of the output and machine II produces 80% of the item. Further, 6% of the items produced by machine I were defective and only 1% produced by machine II was defective. If a defective is drawn at random, what is the probability that it was produced by (i) machine I (i) machine II?

Given table gives an account of differences between PCR and gene cloning. Which of the following points shows the incorrect difference ? {:("Parameter",PCR,"Gene cloning"),(1."Efficient","More","Less"),(2."Apparatus Requirement",DNA,"Restriction enzyme, ligase, vector, bacterial cell"),(3."Manipulation","in vitro","in vitro and in vivo"),(4."Cost","More","Less"),(5."Automation","Yes",No),(6."Error probability","Less","More"),(7."Time for a typical experiment","2-4days",4hours),(8."Application","More","Less"):} a) 1 and 3 b) 4,5 and 6 c) 4 and 7 d) 4,7 and 8