A jar contains black and white marbles. If there are ten marbles in the jar, then which of the following could NOT be the ratio of black to white marbles?

9 : 1

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7 : 3

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1 : 10

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1 : 4

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Solution

The correct option is C $1 : 10$
A jar contains black and white marbles
The total marble is $10$
Optn (A) $9 + 1 = 10$
Optn (B) $7 + 3 = 10$
Optn (C) $1 + 10 = 11$ (does not satisfy the condition so that $10$ is the answer)
Optn (D) $x = 2, 2 + 8 = 10$

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Q. A jar contains 3 red marbles, 7 green marbles and 10 white marbles. If a marble is drawn from the jar at random, what is the probability that this marble is white?

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A jar contains black and white marbles. If there are ten marbles in the jar, then which of the following could NOT be the ratio of black to white marbles?

The correct option is C 1:10A jar contains black and white marblesThe total marble is 10Optn (A) 9+1=10Optn (B) 7+3=10Optn (C) 1+10=11 (does not satisfy the condition so that 10 is the answer)Optn (D) x=2,2+8=10

The correct option is C $1 : 10$
A jar contains black and white marbles
The total marble is $10$
Optn (A) $9 + 1 = 10$
Optn (B) $7 + 3 = 10$
Optn (C) $1 + 10 = 11$ (does not satisfy the condition so that $10$ is the answer)
Optn (D) $x = 2, 2 + 8 = 10$