Question

What is the experimental probability of rolling a 5 on a standard die if you had fifty trials and fifteen successes?

three percent

fifteen percent

thirty percent

thirty-five percent

Answer 1

basic probability definition is:
probability of an experiment = (no. of events favourable to that event)/ (total number of events)
in your case how many are favourable and how many are total?

Answer 2

15 favorable and 50 total

Answer 3

then how much is the probability?

Answer 4

REMEMBER probability always lies between 0 and 1 inclusive, i mean it can be 0 or 1 or any value in between 0 and 1.
if you want percentage , you have to multiply probability with 100

Answer 5

30 percent?

Answer 6

yes you are right

Answer 7

Yay! thank you, can you help with one more please!

Answer 8

okay

Answer 9

Suppose you roll a six-sided die two times hoping to get two numbers whose sum is less than 4. What is the sample space? How many favorable outcomes are there?

Answer 10

okay tell which pair u should get to have total sum less than 4 like 1 in first and 3 in second?
what else are there

Answer 11

i mean list out all the favourable events

Answer 12

The sample space is (1,1)(1,2)(1,3)(1,4)(1,5)(1,6)(2,1)(2,2)(2,3)(2,4)(2,5)(2,6)(3,1)(3,2)(3,3)(3,4)(3,5)(3,6)(4,1)(4,2)(4,3)(4,4)(4,5)(4,6)(5,1)(5,2)(5,3)(5,4)(5,5)(5,6)(6,1)(6,2)(6,3)(6,4)(6,5)(6,6)
The favorbale outcomes are (1,1) 1,2)(2,1)so..
3/36 = 1/12

Answer 13

is this right?

Answer 14

yes if he said its "less than 4"

Answer 15

You are doing great by the way
and remember this :
if a die which as has n sides rolled k times then sample space would be n*k
for most of the die problems in probability he will give us 6 sided die only

Answer 16

cooooooooooooool