Answer:
in steps
Step-by-step explanation:
If it is a fair roulette, the probability to land on RED should be the same no matter what results are in the previous spin
a) 18/38
b) 18/38
c) Yes, I'm confident of the answers. Because it's fair and there is no change of RED numbers.
Rounding off to thousandths is referring to the hundredth number(3rd number from right)
if it's >5, it +1 to the thousand's number (4th number from right),
eg. 4570 rounded off by thousand = 5000
if <5 then it reduces to 0.
eg. 3489 rounded off by thousand = 3000
for your case, 2,181,465 rounded off to thousand = 2,181,000
1/20 mile. divide 1/4 by 5 by fliping the division sign and 5. (1/4)(1/5)=1/20
Diameter of the larger gear х см
1/4х = 16 - 2.5
1/4x = 13.5
x = 13.5 * 4
x = 54 cm - diameter of the larger gear /
