Answer:
a = 7.4
b = 9.6
Step-by-step explanation:
set up a proportion to find 'b':
XN / NY = MN / NO
8/b = 13/(b+6)
cross-multiply:
13b = 8(b+6)
13b = 8b + 48
5b = 48
b = 9.6
set up a proportion to find 'a':
XN / XY = MN / MO
8/a = 13/12
cross-multiply:
13a = 96
a ≈ 7.4
Answer:
45
Step-by-step explanation:
tu
Answer:
1) 0.00274
2) 0.872
3) 0.00240
Step-by-step explanation:
1) 365/(365×365) = 1/365
= 0.002739726027
= 0.00274 (3 sf)
2) (364/365)^50
= 0.8718182573
= 0.872 (3 sf)
3) [365 × (364^48)]/(365^50)
= 0.002401685062
= 0.00240 (3 sf)
Two hundred would be appropriate for a random sample. It doesn't get everyone involved yet has a sustainable amount of people.
