Ram put 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?

$\frac{7}{20}$

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$\frac{3}{5}$

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$\frac{1}{5}$

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$\frac{1}{4}$

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Solution

The correct option is C
$\frac{1}{5}$

Total number of buttons in all = 4 + 7 + 3 + 6 = 20.
Number of blue buttons on the table = 4.
Probability that the button on the floor is blue, $P (b l u e) = \frac{4}{20} = \frac{1}{5}$

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Question 12

Ram put 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 an knocked out one button on the floor. What is the probability that the button on the floor is blue?

(a) $\frac{7}{20}$

(b) $\frac{3}{5}$

(d) $\frac{1}{4}$

Question 12

(a) $\frac{7}{20}$

(b) $\frac{3}{5}$

(d) $\frac{1}{4}$

Q. A box has

2

blue and

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yellow buttons of the same size. Two buttons are chosen at random without replacement. What is the probability that both are blue?

Q. In the wardrobe of Mr. Raman Bhalla, there are 200 tailored suits kept. 110 suits are made up of silk. 76 suits have matching buttons. 60 suits are made up of silk and are white in colour. 30 suits are white in colour and have matching buttons. 40 are made up of silk and have matching buttons. 10 suits are made up of silk, are white in colour and have matching buttons. There are 44 suits which are blue in colour. There are 10 blue suits with matching buttons. 10 blue suits are made up of silk. 10 blue suits are made up of silk and have matching buttons. There are 100 white coloured suits. A suit can have only one unique colour.
How many blue suits are neither made up of silk nor they have matching buttons?

If white buttons represent positive integers and black buttons represent negative integers. Find the net value of all the buttons shown:

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Ram put 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?

The correct option is C 15 Total number of buttons in all = 4 + 7 + 3 + 6 = 20. Number of blue buttons on the table = 4. Probability that the button on the floor is blue, P(blue)=420=15

The correct option is C
$\frac{1}{5}$

Total number of buttons in all = 4 + 7 + 3 + 6 = 20.
Number of blue buttons on the table = 4.
Probability that the button on the floor is blue, $P (b l u e) = \frac{4}{20} = \frac{1}{5}$