Answer:
its a conversion you mutlply by 100
Step-by-step explanation:
Since there is 7 water bottles in a package and the total price is 5.60, you divide 7 by 5.60 which gives you 1.25 per bottle
Answer:
c
Step-by-step explanation:
1/6. theres only one 2, and theres 6 numbers total.
Answer:
120000000000000000
Step-by-step explanation:
1.2*10^17
Answer: 4.1
Step-by-step explanation:
Given : An urn contains 10 balls with the number ‘5’ printed on them, 6 balls with ‘4’ printed on them, and 4 balls with ‘2’ printed on them.
Total balls = 10+6+4=20
Let A , B and C are the events of drawing ball with the number ‘5’, ball with the number ‘4’ and ball with the number ‘2’ respectively.
Then,
![P(A)=\dfrac{10}{20}=0.5\\\\ P(B)=\dfrac{6}{20}=0.3\\\\ P(C)=\dfrac{4}{20}=0.2](https://tex.z-dn.net/?f=P%28A%29%3D%5Cdfrac%7B10%7D%7B20%7D%3D0.5%5C%5C%5C%5C%20P%28B%29%3D%5Cdfrac%7B6%7D%7B20%7D%3D0.3%5C%5C%5C%5C%20P%28C%29%3D%5Cdfrac%7B4%7D%7B20%7D%3D0.2)
If X is the number observed.
Since ![E[X]=\sum_{i=1}^{n}x_ip_i](https://tex.z-dn.net/?f=E%5BX%5D%3D%5Csum_%7Bi%3D1%7D%5E%7Bn%7Dx_ip_i)
Then,
![E[X]=5\times P(A)+4\times P(B)+2\times P(C)\\\\=5\times 0.5+4\times 0.3+2\times 0.2\\=4.1](https://tex.z-dn.net/?f=E%5BX%5D%3D5%5Ctimes%20P%28A%29%2B4%5Ctimes%20P%28B%29%2B2%5Ctimes%20P%28C%29%5C%5C%5C%5C%3D5%5Ctimes%200.5%2B4%5Ctimes%200.3%2B2%5Ctimes%200.2%5C%5C%3D4.1)
Hence, E[X]=4.1