An ENGDATA class for engineers comprises of 5 modern, 10 hardware, 12 mechanical, 10 electrical, and 8 structural designing understudies. On the off chance that an individual is arbitrarily chosen by the educator to address an inquiry, discover the likelihood that the understudy picked is:

a. a structural designing understudy

b. a hardware designing understudy

c. a mechanical or electrical designing understudy

I. Address for Z and discover its region

1. Mean = 81, score: x = 71.5, standard deviation: = 9.

2. Mean = 47, score: x = 55.6, standard deviation: = 4.

3. Mean = 68, score: x = 78.8, standard deviation: = 6.

4. Mean = 51, score: x = 69, standard deviation: =7.

5. Mean = 85, score: x = 93, standard deviation: =5.

6. The mean costs of Dela Cruz Family is PhP12,600 at regular intervals and the

standard deviation is PhP 1, 570., If the costs are ordinarily disseminated, what is

the likelihood of burning-through not exactly PhP 11,000 out of 15 days?

7. The mean creation of assembly line laborers is 10 completed items each hour, with a

standard deviation of 1.5 items/hour. What is the likelihood of completing: a.

..5..

under 12.8 items/hour? b. in excess of 12 items/hour?

8. The mean load of bugs for research center examinations is 13.2 g, with the norm

deviation of 0.8 g. What is the likelihood of arbitrarily choosing creepy crawlies with

weight of : a. 14 g? b. 13.1 to 13.6 g?

9. The lifetime of CP batteries from a specific producer is 25 hours whenever utilized

ceaselessly, the standard deviation is 5 hrs. In the event that the dispersion is ordinarily

disseminated, how long is the cut-off in choosing the best 10% as far as

lifetime?

10. The organization's benefit follows an ordinary dissemination with a mean of PhP 500

thousands every month, with a standard deviation of PhP 50 thousands. What is the

least 20% of the benefit?

1. The load of goats at a ranch is ordinarily circulated with a mean of 60 kg and a standard deviation of 10 kg. A truck used to ship goats can just oblige not in excess of 650 kg. On the off chance that 10 goats are chosen aimlessly from the populace, what is the likelihood that the absolute weight surpasses the greatest weight?

2. The blood gatherings of 200 individuals are circulated as follows: 40 have tpe A blood, 75 have type B blood, 60 have type O blood, and 25 have ype AB blood. On the off chance that an individual from any of the gathering is chosen aimlessly, what is the likelihood that this individual has an O blood classification? What about the AB blood classification?

3. The number of mishaps in a creation office has a Poisson dispersion with a mean of 2.7 each month. For a given month, what is the likelihood that there will be more than three (3) mishaps?

A specific neurotoxin has a 60% likelihood of murdering an individual relying upon the host's response and invulnerability. In the event that 25 individuals are infused with this sort to neurotoxin, discover the likelihood that:

a. 18 individuals will endure

b. in any event 23 individuals will endure

c. at most 3 individuals will endure