63/x=90/100
5670=100x
56.7
7 times 6 is 42
91 divided by 7 is 13
Answer: 2 and 3
Step-by-step explanation:
I did this and got it right
Answer:
a) 0.172
b) 0.167
c) 0.1404
Step-by-step explanation:
Margin of error, E = 
here,
p = probability of the event
n = sample size
a) n = 30
p = 10 ÷ 30 = 0.333
Therefore,
E = 
= 2 × 0.0861
= 0.172
b) n = 30
p = 21 ÷ 30 = 0.7
Therefore,
E = 
= 2 × 0.0836
= 0.167
c) n = 30
p = 22 ÷ 50 = 0.44
Therefore,
E = 
= 2 × 0.0702
= 0.1404
Answer: 1/7
Step-by-step explanation: There are 7 days in a week. Hope this helps! ~Autumn~