Question

Let's Revise F Choose the correct preposition to complete the sentences. 1. My uncle knows interesting facts (overlabout) the world's oceans. 2. She takes great interest (at/in) discussing political issues. 3. He is well known (bylfor) being a skilled craftsman. 4. The teacher stressed (on/about) the importance of planning. 5. Tomatoes are rich (in/for) antioxidants that are good for health. 6. I discussed the problem (to/with) my mother. 7. Dry weather conditions are unsuitable (for/to) cultivating paddy. 8. There is such a contrast (to/between) them! 9. We congratulated the team (forlon) their winning . 10. I will always be indebted (in/to) you for your help. the cup​

Answer 1

Explanation:

Median is the middlemost observation in a given set of data.

Given: Observations and median.

To find: The value of a.

Answer:

Observations: 4 , 6 , a , 9 , 10 and 19.

Total number of observations: 6.

Median = \sf\frac{n/2\ + n/2\ +\ 1}{2}

2

n/2 +n/2 + 1

, where n = total number of observations.

NOTE: The above formula is used only if n = an even number.

\begin{gathered}\sf7.5 = \frac{6/2\ +\ 6/2\ +\ 1}{2} \\\\7.5 = \frac{3rd\ term\ +\ 4th\ term}{2} \\\\7.5 = \frac{a\ +\ 9}{2} \\\\7.5 \times2 = a + 9\\\\15 = a + 9\\\\a = 15 - 9\\\\a = 6\end{gathered}

7.5=

2

6/2 + 6/2 + 1

7.5=

2

3rd term + 4th term

7.5=

2

a + 9

7.5×2=a+9

15=a+9

a=15−9

a=6

Therefore, a = 6.

Answer 2

your answer is in the attachment given above