The probability of getting a 1 is 0.3
1 answer:
Answer: 45
Step-by-step explanation:
To calculate the probability of the number of times a 1 we appear , we have
number of times a 1 appeared / Total number of times the die is rolled.
Let x represent the number of times a 1 is gotten
And we have been given the probability of getting a 1 and also the total number of times the die is being rolled , substituting this inside the formula above , we have
0.3 = x / 150
x = 150 x 0.3
x = 45
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Answer:
Step-by-step explanation:
We know that the standard quadratic equation is ax^2+bx+c=0
Let's compare all the given equation to it and , find discriminant.
1. a=2, b= -7, c=-9
So it has 2 real number solutions.
2. a=1, b=-4, c=4
So it has only 1 real number solution.
3. a=4, b=-3, c=-1
So it has 2 real number solutions.
4. a=1, b=-2, c=-8
So it has 2 real number solutions.
5. a=3, b=5, c=3
Thus it does not has real solutions.