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
ExtremeBDS [4]
3 years ago
8

A fair coin is tossed 4 times. what is the probability that at least 2 heads appear

Mathematics
1 answer:
shusha [124]3 years ago
6 0
HHHH TTTT HHHT HHTH HTHH THHH TTTH TTHT THTT HTTT
HHTT HTHT HTTH TTHH THTH THHT 

-  is the sample space.

 Total possible arrangements = 16.
Number  with at least 2 heads = 11

Required probability = 11/16


You might be interested in
2 women and 7 girls can do a peice of work in 4 days.4 women and 4 girls can do the same work in 3 days. How long would it take
svetlana [45]

Answer:

x: work a woman can do in 1 day

y: work a girl can do in 1  day

Then

2x + 7y =1/4

4x + 4y =1/3

4x + 14y =2/4 (1)

4x + 4y  =1/3 (2)

=> Let (1) - (2), 10y =2/4-1/3 <=>10y = 1/6 <=> y = 1/(6x10) = 1/60 (work)

=> From (2),4x = 1/3 - 4x1/60 => 4x = 16/60 => x = 4/60 (work)

=> 1 day, a woman and a girl can do: 1/60+4/60 = 5/60 =1/12 (work)

Then, the day required for a woman and a girl to complete work: 12 days

3 0
3 years ago
A clothing salesman want to earn $6000 in March. He receives a base salary of $4000 per mont as well as a 10% commission for all
N76 [4]
He would have to sell $20,000 worth of clothes to get $2,000
6 0
3 years ago
-5x + y = -2<br> -3x + 6y = -12
Korolek [52]

Answer:

x = 0

y = -2

Step-by-step explanation:

-5x + y = -2

x = 0

y = -2

-3x + 6y = -12

x = 0

y = -2

6 0
3 years ago
Please help!! i have no idea how to do this
Deffense [45]

Answer:

D:15

Step-by-step explanation:

You divide thirty by two and get 15.

4 0
3 years ago
Read 2 more answers
Evaluate this expression what is <br> b=-6 and c=7.c-7b
VLD [36.1K]

Answer:

49

Step-by-step explanation:

substitute b = - 6 and c = 7 into the expression and evaluate

c - 7b = 7 - (7 × - 6) = 7 - (- 42) = 7 + 42 = 49


7 0
3 years ago
Other questions:
  • What is the simplified expression for:
    12·1 answer
  • Abby can buy an 8-pound bag of dog food for $7.40 or a 4-pound bag of the same dog food for $5.50. Which is the better buy.
    7·2 answers
  • The dot plots below show rainfall totals in the Highlands and Lowlands areas of a certain region.
    15·2 answers
  • A quadratic function has a line of symmetry at x = –3 and a zero at 4.
    9·1 answer
  • The figure below shows segments KL and MN which intersect at point P. Segment KM is parallel to segment LN:
    5·2 answers
  • Marjorie drops an object from a height of h meters, and it hits the ground with a velocity of v m/s, as given by the function v
    10·1 answer
  • What is the discontinuity of the function f(x)= x^2-4x-12/x+2. PLEASE ASAP WILL GIVE BRAINLIEST!
    6·1 answer
  • What 4a+7b+5a-b please sorry
    6·2 answers
  • A box is 10 inches long, 3 inches wide and, 4 inches high. What is the surface area, in square inches, of a closed box?
    12·1 answer
  • Rodney created a graph of each given linear equation below, but Rodney made mistakes on each of his graphs. Explain Rodney’s err
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!