1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
vekshin1
3 years ago
6

A coin is tossed 7 times. What is the probability of getting all tails? Express your answer as a simplified fraction or a decima

l rounded to four decimal places.
Mathematics
1 answer:
Inessa05 [86]3 years ago
3 0

Answer:

0.0078125

Step-by-step explanation:

Probability of tail, p = 0. 5

Probability of getting all tails from 7 tosses :

P(tail) * P(tail) * P(tail) * P(tail) * P(tail) * P(tail) * P(tail)

0.5 * 0.5 * 0.5 * 0.5 * 0.5 * 0.5 * 0.5 = 0.0078125

We could also use the binomial probability formula :

P(x =x) = nCx * p^x * (1 - p)^(n - r)

n = 7 ; x = 7, p = 0.5,

P(x = 7) = 7C7 * 0.5^7 * 0.5^0 = 0.0078125

You might be interested in
Is x−1 a factor of 3x3−5x2−2?
lions [1.4K]

Answer:

Yes

Step-by-step explanation:

According to google the anser is yes.

4 0
3 years ago
What is the quotient ? a-3/7 divided by 3-a/21
LUCKY_DIMON [66]
Final result :  -3



Step by step solution :Step  1  :            3 - a Simplify   —————             21  Equation at the end of step  1  :  (a - 3)   (3 - a)  ——————— ÷ ———————     7        21   Step  2  :            a - 3 Simplify   —————              7  Equation at the end of step  2  :  (a - 3)   (3 - a)  ——————— ÷ ———————     7        21   Step  3  :         a-3      3-a Divide  ———  by  ———          7       21 
 3.1    Dividing fractions 
To divide fractions, write the divison as multiplication by the reciprocal of the divisor :
a - 3     3 - a       a - 3        21  —————  ÷  —————   =   —————  •  ———————  7        21           7       (3 - a)
 3.2    Rewrite   (3-a)    as  (-1) •  (a-3) Canceling Out : 3.3    Cancel out  (a-3)  which now appears on both sides of the fraction line.
Final result :  -3
4 0
3 years ago
Read 2 more answers
4b-4=3b+4<br> solve for b
damaskus [11]

Answer:

4b-3b=4+4

b=8

Step-by-step explanation:

Hence, the value of b is 8

#hope it helps

6 0
3 years ago
Read 2 more answers
Note: Enter your answer and show all the steps that you use to solve this problem in the space provided.
Amiraneli [1.4K]
The side x is equal to 12
7 0
2 years ago
To amend the U.S. Constitution, 3/4 of the 59 states must approve the amendment. If 35 states approve an amendment, will the con
Dominik [7]

Answer:

No

Step-by-step explanation:

3/4 of 59 is 44.25. More than 44 states need approve the constitution to be amended

8 0
3 years ago
Read 2 more answers
Other questions:
  • When given the coordinates of the vertices of a triangle, can the slope formula be used to determine whether the triangle is a r
    8·1 answer
  • What is the customary unit to the length of a car
    7·1 answer
  • SOMEONE PLEASE HELP!!!! I AM ON A TIME LIMIT
    6·1 answer
  • Complete the equation:1(2/3) mi =how many ft.
    8·1 answer
  • If Simon has 3 shoes and he sells 1 how many does he have left?
    9·2 answers
  • Samantha is constructing a door frame with base 30 inches, height 84 inches, and diagonal 91 inches. A sketch of the door frame
    10·1 answer
  • Please help me solve this.<br> 15x+8=-2+14x
    9·1 answer
  • Pls can some help me
    8·1 answer
  • As reported in Trends in Television, the proportion of US households who have at least one VCR is 0.535. If 14 households are se
    11·1 answer
  • GIVING THREE BRAINLIEST PLS HURRY
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!