Jambmaths question:
|
GSM Operator |
GTN |
PLO |
QTEL |
CMob |
|
No of Recharge card |
5 |
6 |
3 |
6 |
The table above shows major GSM operator. What is the probability that a recharge selected at random will be GTN or Qtel
Option A:
$\tfrac{2}{5}$
Option B:
$\tfrac{3}{4}$
Option C:
$\tfrac{3}{20}$
Option D:
$\tfrac{1}{4}$
Jamb Maths Solution:
Total Recharge card 5 + 6 + 3 + 6 =20
Prob of GTN = $\frac{5}{20}=\frac{1}{4}$
Prob of Qtel = $\frac{3}{20}$
Prob of GTN or Qtel = $\frac{1}{4}+\frac{3}{20}=\frac{8}{20}=\frac{2}{5}$
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