Explanation

= 9 /9 x 9/18 x 9/27 x 9/36 x 9/45 

= 1 x 1/2 x 1/3 x 1/4 x 1/5

= 1 x 1 / 2 x 3 x 4 x 5

= 1 x 1/ 120

= 1/ 120

Explanation

Explanation

ND12_8_2023

Explanation

Let the total number of workers be x. Then,

8000x = (12000 * 7) + 6000(x – 7)

=>x=420002000

$x=\frac{42000}{2000}$ 

Answer = 21

Explanation

Let us convert the given word expression into a numerical format by deriving each term and its operation.

The operation of multiplication or 'x' in words is 'times'.

Eight times of a number b is denoted by 8xb = 8b.

Ten times of a number c is denoted by 10xc = 10c.

The operation of subtraction is denoted by ' - '.

Since we are subtracting eight times the number b from ten times the number c, we will write the term 10c first and then place the operation sign (of subtraction), which is followed by the next term 10c.

Hence, the required expression is = 10c- 8b.

ND12_8_2023

Explanation

Step 1 of 2 :

Write down the arithmetic mean and total count of numbers

Here it is given that the arithmetic mean of six numbers is 4.5

Arithmetic mean = 4.5

Total count of numbers = 6

Step 2 of 2 :

Calculate the total sum of six numbers

The total sum of six numbers

= Arithmetic mean × Total count of numbers

= 4.5 × 6

= 27

Explanation

an isosceles triangle has equal in sides and in equal angle

Explanation

1,5,9,13, ---- 40th

d=5-1=4 d=9-5=4 =1+(40-1)*4 =1+156 =157

U have to use the formula S=n/2 [2a+(n-1)d]

S=40/2[2(1)+(40-1)4]

S=20[2+(39)4]

S=20[156]

S=3160

ND-8-08-2023

Explanation

0.25:X::X:0.04

0.25*0.04=x²

25/100 *4/100 =X²

100/10000=x²

1/100=x²

Taking square root on b.s

1/10=X

0.1=X

So option B is the right answer.

SH8-24-2023

Explanation

percent is 3/4 of 5/6 is  90%

..

Explanation:

3/4 = x% of 5/6

3/4×6/5 =9/10 =x%

x = 9/10 × 100 = 90%