Question

Plz help

A spinner is separated into 4 equal pieces, as shown below:

Jonathan spins the spinner 10 times. What is the theoretical probability that it stops on the black sector on the last spin?

1/40
1/4
5/2
41/4

Answer 1

@Godlovesme
@Michele_Laino

Answer 2

what is the probability that the spinner stops at the black sector after one spin?

Answer 3

1/4 chance

Answer 4

ok!

Answer 5

that is the requested probability

Answer 6

so we have:
probability = 1/4
it is your answer

Answer 7

Ok thanks! But do you mind helping me with 2 more?

Answer 8

ok!

Answer 9

A box contains 100 colored chips; some are yellow and some are green. John chooses a chip at random, records the color, and places it back in the bag. John has recorded 57 yellow chips and 19 green chips. Using these results, what is the predicted number of green chips in the box?

25
43
76
81

Answer 10

the probability to get a green chip is:
19/76, since John has recorded 19 green chips over 19+57=76 total chips

Answer 11

so it's c

Answer 12

now, we have 24 chips into the box, since 100-76 = 24

Answer 13

ok

Answer 14

I think it is:
(19/76)*100=...?

Answer 15

25

Answer 16

that's right!

Answer 17

so its a

Answer 18

yes!

Answer 19

ok thanks next question

Answer 20

Thanks! please wait a moment, another student is calling me

Answer 21

Mike tossed a coin several times and recorded the number of heads and tails in the following table:

What is the experimental probability of getting heads?
0.24
0.26
0.48
0.92

Answer 22

ok I'll wait

Answer 23

the requested probability, isby definition:
\[\large p = \frac{{24}}{{50}} = ...?\]

Answer 24

0.48

Answer 25

@Michele_Laino

Answer 26

yes! that's right!