(a) Four boxes A, B, C, D contain fuses. The boxes contain 5000, 3000, 2000 & 1000 fuses revely. The percentages of fisses in the boxes which are defective are 3%, 2%, 1% and 0.5% respectively. One fuse is selected at random arbitrarily from one of the boxes. It is found to be a defective fuse. Find the probability that it has come from box D. (b) If the density function of a continuous random variable X is given by 0 . x 4 i) Find the values of a (i) Find the edf of X (iii) Find P (X>2.5)
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answer is 1000 not defective fuses are there.
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