Is it correct to say that there is no object with order of rotational symmetry as 0.Justify

1 answer:

3 0

No, we cannot say that there is no object with an order of rotational symmetry as 0.

For example:

What do you think the rotational symmetry order of an alphabet "A" is?

The alphabet "A" has got rotational symmetry of order 1, which means NO rotational symmetry is there for letter "A" because we can't rotate it.

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From a shipment of 65 transistors, 6 of which are defective, a sample of 5 transistors is selected at random.

Vladimir79 [104]

Answer:

a) 8259888

b) 34220

c) 45057474

Step-by-step explanation:

Given,

The total number of transistor = 65,

In which, the defective transistor = 6,

So, the number of non defective transistor = 65 - 6 = 59,

Since, out of these transistor 5 are selected,

a) Thus, the number of ways = the total possible combination of 5 transistors = ${65}C_ 5$

$=\frac{65!}{(65-5)!5!}$

$=8259888$

b) The number of samples that contains exactly 3 defective transistors = the possible combination of exactly 3 defective transistors = ${6}C_3\times {59}C_2$