Answer:
an access card as some may contain metallic properties
Explanation:
electromagnets could also be used in the scanner so this could be tried
hope this helps
Answer:
The larger the amplitude of the waves, the louder the sound. The faster the vibrations, the higher the pitch (frequency) of the sound.
Explanation:
Total number of different committees = C(14,6) = N
We have two cases where we have less than 2 teachers.
case 1: 1 teacher (out of 5)
Number of ways to choose 1 teacher = C(5,1) = 5
Number of ways to choose the remaining members from students = C(9,5)
Total number of ways to choose a committee with exactly 1 teacher = 5C(9,5) = N1
case 2: no teacher
Number of ways to choose 6 students = C(9,6) = N2
Probability to choose at least two teachers
= (N-N1-N2)/N
=109/143
I hope tmy answer helps you
Answer:
ii and iii
Explanation:
All the others are voluntary
