Question

A packet of 10 electronic components is known to include 3 defectives. If 4 components
are selected from the packet at random, what is the expected value of the number of
defective?
(a) 1.20 (b) 1.21
(c) 1.69 (d) 1.72

Answer 1

The expected value of no. of defectives would be, (a) 1.20