Acompany that manufactures smartphones makes 70% of the phones with a touch screen and 55% of the phones with hd movie capability. 30% of the phones have both a touch screen and hd movie capability. what is the probability that a smartphone chosen at random has either a touch screen or hd movie capability?

19/20

47/50

13/20

43/50

17/20

Step-by-step explanation:

Let T represents the event of phones with a touch screen and H represents the event of phones with HD movie capability.

Given,

70% of the phones with a touch screen,

⇒ The probability of touch screen phone, P(T) = 70% = 0.7,

55% of the phones with HD movie capability,

⇒ The probability of HD movie capability phones, P(H) = 55 % = 5.5,

Also, 30% of the phones have both a touch screen and HD movie capability,

⇒ The probability of HD movie capability phones with touch screen,

P(H∩T) = 30 % = 0.3,

Hence, the probability that a smartphone chosen at random has either a touch screen or HD movie capability is,

First option is correct.

597

step-by-step explanation:

answer: 33 ( approx)

step-by-step explanation:

since, in the linear regression formula, the slope is the a in the equation y = b + ax ( by comparing it with the general equation of line y = mx + c )

where,

here given table is,

price ($), x   :           18         23       25       29       30       33

pairs sold, y :         16         13         10       8         6       2

so, ,   ,   ,

and   ,

thus, slop of the given line is,

⇒  

⇒   ≈ 33