First things first, you need to figure out the amount of passengers on the fifth bus.
Solution:
40 x 4
-- - = 32 passengers
1 x 5
*The fifth bus has 32 people.
You can now figure out the total number of passengers in all of the buses.
(40 x 4) + 32 = 192
*Overall, all 5 buses have a total of 192 passengers.
Since you have the total number of passengers, you can now figure out the numbers of adults who went on the field trip, which is 1/8 of all the passengers.
Solution:
192 x 1
----- - = 24 passengers
1 x 8
The final answer is: 24 adults went on the field trip.
There are 22 books total on the shelf and 9 of them are biographical books so the probability is 9/22
Answer: x=4, x=-4
Step-by-step explanation: because it is absolute value, negative or positive does not matter.
Answer:
the answer is 22
Step-by-step explanation:
12,15,22,37,49
since 22 is in the middle its the median (make sure you put the #'s from least to greatest)
The 68-95-99.7 rule tells us 68% of the probability is between -1 standard deviation and +1 standard deviation from the mean. So we expect 75% corresponds to slightly more than 1 standard deviation.
Usually the unit normal tables don't report the area between -σ and σ but instead a cumulative probability, the area between -∞ and σ. 75% corresponds to 37.5% in each half so a cumulative probability of 50%+37.5%=87.5%. We look that up in the normal table and get σ=1.15.
So we expect 75% of normally distributed data to fall within μ-1.15σ and μ+1.15σ
That's 288.6 - 1.15(21.2) to 288.6 + 1.15(21.2)
Answer: 264.22 to 312.98
