To get 4 or fewer correct, at least 2 answers have to be wrong. And the probability of that is:
3/4 x 3/4=9/16
1-9/16=probability that 4 or fewer are correct=7/16 ☺☺☺☺

6 0

3 years ago

Determine the gcf and lcm between 45,60 and 80

Ket [755]

Answer: LCM = 720, GCF = 5 Please consider Brainliest.

Step-by-step explanation:

Find the least multiple of all three numbers, it should be 720. Find the Greatest factor, which should work. But remember, 15 doesn't work because 80 doesn't have 15 as a factor.

3 0

2 years ago

An inverted pyramid is being filled with water at a constant rate of 50 cubic centimeters per second. The pyramid, at the top, h

klio [65]

Step-by-step explanation:

Below is an attachment containing the solution.

3 0

3 years ago

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A citrus farmer wants to know which of three fertilizers (A, B, and C) is most effective for increasing the number of oranges on

Lyrx [107]

Description of a Randomized block design for the experiment :

Randomized block design involved the divison of subjects into units, called block. After which treatment are randomly applied to elements or subjects in each block.

Here, we make divide the 30 mature trees into 3 which means we have 3 blocks of 10 mature trees each. The citrus fertilizers A, B and C are then applied randomly to each of the three units.

B.)

The randomized block design used in these experiments will correct for the possible error which could be introduced die to systematic error since each of the treatments(fertilizers A, B and C) would be used in each of the blocks.

Learn more :brainly.com/question/18405415

6 0

3 years ago