Question

ix) If out of 10 balls in a bag 6 are black and 4 are white, then the percentage of
black ball is :
(a)
40%
(b) 60%
(c) 4%
(d) 6%
प्राप्ताक​

Answer 1

Given

• Total number of balls = 10
• Number of black balls = 6
• Number of white ball = 4

To find

• Percentage of black ball

Solution

As we know that

Percentage = Obtained value/Total value × 100

According to the given condition

★ Number of black balls/Total number of ball × 100

→ 6/10 × 100

→ 60%

Additional Information

• Average = Sum of term/number of term
• Probability = Number of favourable outcome/Total number of outcome

Answer 2

Answer:

Given

$Total \: number \: of \: balls \: = 10$

$Number \: of \: black \: balls \: = 6$

$Number \: of \: white \: ball \: = 4$

To find

$Percentage \: of \: black \: ball$

Solution

As we know ,

$Percentage \: = \frac{Obtained \: value}{Total \: value \: \times 100}$

According to the given condition

$\frac{Number \: of \: black \: balls}{Total \: number \: of \: balls \: \times 100}$

$= \frac{6}{10} \times 100$

$= 60\%$