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FromTheMoon [43]
3 years ago
8

A blue die and a green die are rolled what is the probobility of rolling a number less than 7 and 4

Mathematics
1 answer:
Karo-lina-s [1.5K]3 years ago
7 0
I'm going to assume that the die has 6 sides and thus has numbers 1 through 6I'm assuming it isn't a 20 sided DnD dice
color is irrelevant, it's used to keep track of which is which

let's say we choose the blue die to get less than 7 and green to get less than 4

blue:all the numbers an a 6 sided die are less than 7, so probility of rolling a number less than 7 on the blue die is 1

green:
3 numbers on a 6 sided die are less than a 46 numbers, 3 to be rolled, 3/6 or 1/2

so probability is 1 times 1/2 or 1/2 or 50% probablity of getting that outcome
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Answer: About 99.7%  IQ scores falls within 43 and 157.

Step-by-step explanation:

According to the empirical rule , if a data follows normal distribution then about 99.7% of the population lies with in three standard deviations from mean.

Given:   IQ test have a​ bell-shaped distribution with a mean of 100 and a standard deviation of 19.

Since , the graph of normal distribution is bell-shaped , it mean that IQ scores follow normal distribution.

Then, About 99.7%  IQ scores falls within Mean ± 3 (Standard deviation).

i.e. About 99.7%  IQ scores falls within 100± 3(19).

i.e. About 99.7%  IQ scores falls within 100- 57 and 100+57.

i.e. About 99.7%  IQ scores falls within 43 and 157.

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About 99.7%  IQ scores falls within 43 and 157.

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