Here are the answers.
6. 63/100
7. 75/100 = 3/4
8. 91/100
9. 18/100 = 9/50
10. 3/100
11. 25/100 = 1/4
12. 5/100 = 1/20
13. 16/100 = 4/25
14. 1/100
15. 79/100
16. 40/100 or 4/10 = 2/5
17. 99/100
18. 30/100 or 3/10 = 3/10
19. 15/100 = 3/20
20. 84/100 = 21/25
I hope you find this answer the most helpful! :)
Since Tina replaces the beads after each pick:
P(R,G,R)=(1/5)(1/5)(1/5)=1/125
Answer:
190 chairs
Step-by-step explanation:
-This is an arithmetic progression with the first term a=10, the common difference is d=2 and the number of terms n=10.
-The sum of n terms in the progression can be calculated as follows:
![S_n=0.5n(a_1+a_n)](https://tex.z-dn.net/?f=S_n%3D0.5n%28a_1%2Ba_n%29)
Where
is the sum of the progression's terms.
are the first and last terms of the progression.
#We calculate
as below:
![a_n=a_1+d(n-1)\\\\a_{10}=10+2(10-1)\\\\=28](https://tex.z-dn.net/?f=a_n%3Da_1%2Bd%28n-1%29%5C%5C%5C%5Ca_%7B10%7D%3D10%2B2%2810-1%29%5C%5C%5C%5C%3D28)
#We then substitute to calculate the sum of the terms:
![S_n=0.5n(a_1+a_n)\\\\=0.5\times 10(10+28)\\\\=190](https://tex.z-dn.net/?f=S_n%3D0.5n%28a_1%2Ba_n%29%5C%5C%5C%5C%3D0.5%5Ctimes%2010%2810%2B28%29%5C%5C%5C%5C%3D190)
Hence, 190 chairs are needed for the 10 rows.
Answer:
Option D.
Step-by-step explanation:
Juanito estimated that 31% of 517 is 204 is estimated wrong because
31% of 517 = 0.31 × 517 = 160.27
Now we will go through all the options.
A. 30% of 520 = 0.30 × 520 = 156
B. 40% of 520 = 0.40 × 520 = 208
C. 30% of 510 = 0.30 × 510 = 153
D. 40% of 510 = 0.40 × 510 = 204
Option D.