MCQ 11 Mark
Ram puts some buttons on the table. There were 4 blue, 7 red, 3 black and 6 white buttons in all. All of a sudden, a cat jumped on the table and knocked out one button on the floor. What is the probability that the button on the floor is blue?
- A$\frac{7}{20}$
- B$\frac{3}{5}$
- ✓$\frac{1}{5}$
- D$\frac{1}{4}$
Answer
View full question & answer→Correct option: C.
$\frac{1}{5}$
(c) $\frac{1}{5}$
Hint Total number of buttons
= 4 blue + 7 red + 3 black + 6 white
= 20
Number of blue buttons = 4
Probability of blue button on the floor
$\begin{array}{l}=\frac{\text { Number of blue buttons }}{\text { Total number of buttons }} \\ =\frac{4}{20}=\frac{1}{5}\end{array}$
Hint Total number of buttons
= 4 blue + 7 red + 3 black + 6 white
= 20
Number of blue buttons = 4
Probability of blue button on the floor
$\begin{array}{l}=\frac{\text { Number of blue buttons }}{\text { Total number of buttons }} \\ =\frac{4}{20}=\frac{1}{5}\end{array}$







