A box contains 12 electric lamps of which 5 are defectives. A man sclects three lamps at random. What is the expected number of defective lamps in his selection?(a) 1.25(6) 2.50(C) 1.05(d) 2,03

A box contains 12 electric lamps of which 5 are defectives. A man scle

1.	A box contains 12 electric lamps of which 5 are defectives. A man sclects three lamps at random. What is the expected number of defective lamps in his selection?(a) 1.25(6) 2.50(C) 1.05(d) 2,03
Answer» ANSWER is 5 /12Mark as BRAINLIST answerfollow me

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A box contains 12 electric lamps of which 5 are defectives. A man sclects three lamps at random. What is the expected number of defective lamps in his selection?(a) 1.25(6) 2.50(C) 1.05(d) 2,03​

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A box contains 12 electric lamps of which 5 are defectives. A man sclects three lamps at random. What is the expected number of defective lamps in his selection?(a) 1.25(6) 2.50(C) 1.05(d) 2,03