You are testing a theory that says that students who speak a foreign language are also strong math students. You survey the eighth-grade class and the results are shown in the incomplete two-way
table. What percentage of the students speak a foreign language and have a Math Class
Grade of an A (round to the nearest percent)?
Speak a Foreign Language Do Not Speak a Foreign Language
Math Class Grade is an A
(70
Math Class Grade is Not an A
10
?
50
Totals
?
? 60
? 35
Totals
?
15
48%
82
41%
88%

question:

could we have options?

hello,

b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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step-by-step explanation: