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3 years ago

What is the probability of flipping a coin 4 times and it landing heads every time?

Mathematics

1 answer:

Anna71 [15]3 years ago

7 0

1/4 times. Though there are only 2 sides within a coin, you are still give 4 chances.

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Sixty percent of the students at a certain school wear neither a ring nor a necklace. Twenty percent wear a ring and 30 percent

Reptile [31]

Answer:

0.4

Step-by-step explanation:

Given

60 % wear neither ring nor a necklace

20 % wear a ring

30 % wear necklace

This question can be Solved by using Venn diagram

If one person is choosen randomly among the given student the probability that this student is wearing a ring or necklace is

$P\left ( wear \ ring\ or \ necklace )+P\left ( neither\ ring\ or\ necklace)=1$

$P\left ( wear \ ring\ or\ necklace )=1-0.6=0.4$

The sum of probabilty is equal to 1 because it completes the set

Therefore the required probabilty is 0.4

7 0

3 years ago

Greg is 10 years older than his brother gabe. He is also 3 times as old as gabe. How old is Greg?

Mashcka [7]

Answer: 30 i think 10x3=30

Step-by-step explanation:

5 0

3 years ago

2d+4=10+2.5d<br><br> Help Me

sergiy2304 [10]

Subtract 2d from both sides

simplify 10 + 2.5d - 2d to 10 + 0.5d

subtract 10 from both sides

simplify 4 - 10 to -6

divide both sides by 0.5

simplify 6/0.5 to 12

switch the sides

Answer: d = -12.

6 0

3 years ago

Please help me i beg you I really need

SCORPION-xisa [38]

The correct answer is B, sorry if it wasn't correct.

3 0

3 years ago

Read 2 more answers

Evaluate -4a+8z if a=8 and z=3?

vladimir1956 [14]

Answer:

-8

Step-by-step explanation:

-4 x 8 = -32

8 x 3 = 24

-32 + 24 = -8

Hope this is right and helps!

4 0

3 years ago