Answer:
Step-by-step explanation:
Given that a student takes a 20-question, multiple-choice exam with five choices for each question and guesses on each question.
Since each question has 5 choices p = probability for success = pr for getting correct guess = 0.2
Each question is independent of the other and q= pr for failure =1-0.2=0.8
Hence we have X, no of correct questions in the test is binomial n =20 and p =0.2
the probability of guessing at least 15 out of 20 correctly
=
<0.00001
So we can consider this event unlikely to occur because the probability is almost zero.
Given :
- An angle which measures 26.8° less than the measure of its complementary angle.
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To Find :
- The measure of each angle.
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Solution :
- Let's assume the one of the complementary angle as "x" and the other angle as (x – 26.8)° .
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Now,
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According to the Question :
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Therefore,
- Other angle = 58.4° – 26.8° = 31.6°
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Hence,
- The measure of the each angles are 58.4° and 31.6° .
Answer:
=3x to the power of 12+20x to the power of 6+6
Step-by-step explanation:
<em><u>simplify step-by-step-</u></em>
There are no like terms so that means that the answer is
=3x to the power of 12+20x to the power of 6+6
Answer:
The average of students in the two classes who went on the field trip is .
Step-by-step explanation:
Average =
Average of students in the two classes =