Mean means average, so add all the ages together and divide by the number of people asked:
19 + 27 + 25 + 21 + 44 + 22 + 45 + 34 = 237
237 / 8 = 29.625 = 30 years
Answer:
d. 21
Explanation:
Step 1 - Subtract 13 from both sides
x + 13 = 34
x + 13 - 13 = 34 - 13
x = 21
The the mean score (rounded to 2 DP) in the maths test across both classes is 63.67
What is the mean of scores?
The mean of scores is the sum of the scores for all students divided by the number of students
Class A:
mean score=39
mean score=sum of scores/number of students
39=sum of scores/11
sum of scores=39*11
sum of scores=429
Class B:
mean score=76
mean score=sum of scores/number of students
76=sum of scores/22
sum of scores=76*22
sum of scores=1672
overall mean score=(429+1672)/(11+22)
overall mean score= 63.67
Find out more about mean on:brainly.com/question/20118982
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I would go with the second choice.
Answer:
Multiplying the mass of ice by the specific latent heat of fusion of ice
Step-by-step explanation:
The heat energy required to completely melt 100 grams can be calculated by multiplying the mass of ice (100g) by the specific latent heat of fusion of ice (336J/g)