There are 3 sets of balls numbered 1 through 10 placed in a bowl. If 3 balls are randomly chosen without replacement, find the probability that the balls have the same number. Express your answer as a fraction in lowest terms or a decimal rounded to the nearest millionth.

1/406 or 0.0024630

Step-by-step explanation:

3 sets of balls numbered 1 through 10  are equivalent to 30 balls in total with each number appearing three times.

After the first ball is picked, there are 29 balls left, 2 of which have the same number as the first ball. If we pick two equal balls, there is now a single equal ball left out of 28 balls in the bowl. The probability of picking three equal balls is:

The probability is 1/406 or 0.0024630.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.

it's both, now can you answer my most recent question?