A box contains blue, green and white beads. The ratio of the number of blue beads to the number of green beads to the number of white beads is 5:2:3. If there are 90 blue beads, how many beads there altogether?

There are 180 beads altogether

Step-by-step explanation:

5 units of blue beads=90

1 unit of beads= 90 ÷ 5

= 18

Total number of units= 5 + 2 + 3

= 10

10 units of beads(Total number of beads) = 18 × 10

= 180

answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0