please answer the question this my exam questions
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Answer:
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Step-by-step explanation:
3.i) a) Highest marks = 95
b) Highest marks = 95
Lowest marks = 39
Range = Highest marks - Lowest marks
95 - 39 = 56
c) Mean = Total sum of all the data/ Total no. of data
85 + 76 + 90 + 85 + 39+ 48 + 56 + 95 + 81 + 75/ 10 = 1430/10 = 143
ii) First we will arrange the data in ascending order.
12, 12, 13, 13, 14, 14, 14, 16, 19
Madian = Middle no. = 14
iii) Probability = No. of favorable outcome/ Toatl no. of outcome = 1/6
Hence, Probability = 1/6
iv) 4(3 + m) = 18
12 + 4m = 18
4m = 18 - 12
4m = 6
m = 6/4 = 3/2
v) Let the no. be x
5x/2 - 7 = 23
5x/2 = 23 + 7
5x/2 = 30
5x = 30 × 2
5x = 60
x = 60/5 = 12
vi) Complementary angle = 90⁰
Measure of the first angle = 45⁰
The second angle = 90⁰ - 45⁰ = 45⁰
vii) Alternate angle in the adjoining figure =
a) 1 & 8
b) 2 & 7
c) 3 & 6
d) 4 & 5