Answer:
B
Step-by-step explanation:
First calculate BD using sine ratio in Δ BCD and the exact value
sin60° = 
, thus
sin60° = 
= 
= 
= ( cross- multiply )
2BD = 12
( divide both sides by 2 )
BD = 6
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Calculate AD using the tangent ratio in Δ ABD and the exact value
tan30° = 
, thus
tan30° = 
= 
= 
= ( cross- multiply )
AD = 6 ( divide both sides by )
AD = 6 → B
Answer:
Total probability value is 1
P(green) = 0.2 , P(brown) = 0.54
Given P(red) = P(yellow) = x
Total Probability = P(green) + P(Brown) + x + x
1 = 0.2 + 0.54 + 2x
1 - 0.74 = 2x
x = 0.13
P(red) = P(yellow) = 0.13
Now number of times it landed on each color :
Since P(red) = P(yellow) , the number of time on yellow and red are same.
Answer :
Red 156
Green 240
Brown 648
Yellow 156
Answer:
9:12 and 12:16
Step-by-step explanation:
3/4 = 0.75
9/12 = 0.75
12/16 = 0.75
t = 2/3. Multiply the numbers in the parentheses by -1. It becomes 9t + -3t + -3 = 1. Combine like terms to get 6t + -3 = 1. Add 3 to both sides to get 6t = 4. Divide both sides by 6. t = 2/3
