Question

a bag contains 4 blue balls and some red balls if the probability of drawing a blue ball from the bag is 2 by 5 find the number of red balls in the bag​

Answer 1

Answer:

Bag contains 6 red balls !!!

Step-by-step explanation:

Total probability = 1

probability of drawing a blue ball = 2/5

probability of drawing a red ball = 1 - 2/5

=3/5

Now 2x/5= 4

2x = 4× 5

x = 20 / 2

x = 10

So , total number of balls in bag = 10

Hence red balls in bag = 10 - 4

= 6

SO SOLUTION ENDS WITH A BIG SMILE.....THINK OF GIVEN AND CONCERNTRATE ....THEN YOU CAN DEFINITELY SOLVE MATH 'QUESTION ......

Answer 2

Answer:

total probability =1

probabily of drawing a blue ball=2/5

so the probabilty of drawing a red ball=1-2/5

=5/5-2/5

=3/5

so

number of blue balls=4

=so number red balls =10-4=6