The table above shows the distribution of recha... - JAMB Mathematics 2006 Question

The table above shows the distribution of recharge cards of four major GSM operators. What is the probability that a recharge card selected at random will be GTN or Qtel?

A

3/20

B

1/4

C

2/5

D

3/4

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Correct Option: C

P(GTN) = 5/20

P(Qtel) = 3/20

∴P(GTN or Qtel) = (5/20) + (3/20)

= 8/20

= 2/5

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