1. (4 points) Looking at the following life table (WHO), estimate that probability that a 40-year old will survive to age 80.

Liberia - 2006

both sexes

Age range	nMx	nqx	lx	ndx	nLx	Tx	ex
<1	0.17631	0.15694	100000	15694	89014	4420987	44.2
1-4	0.02447	0.09245	84306	7794	318518	4331972	51.4
5-9	0.00541	0.02669	76512	2042	377454	4013454	52.5
10-14	0.00289	0.01436	74470	1070	369674	3636000	48.8
15-19	0.00330	0.01636	73400	1201	363997	3266326	44.5
20-24	0.00635	0.03125	72199	2256	355353	2902329	40.2
25-29	0.00835	0.04089	69942	2860	342562	2546975	36.4
30-34	0.01047	0.05103	67082	3423	326853	2204414	32.9
35-39	0.01316	0.06370	63659	4055	308158	1877560	29.5
40-44	0.01523	0.07336	59604	4373	287088	1569403	26.3
45-49	0.01704	0.08170	55231	4512	264875	1282315	23.2
50-54	0.02051	0.09756	50719	4948	241225	1017440	20.1
55-59	0.02761	0.12914	45771	5911	214078	776215	17.0
60-64	0.03494	0.16066	39860	6404	183291	562138	14.1
65-69	0.05052	0.22428	33456	7504	148522	378847	11.3
70-74	0.07571	0.31830	25953	8261	109111	230324	8.9
75-79	0.11134	0.43550	17692	7705	69198	121213	6.9
80-84	0.16298	0.57898	9987	5782	35480	52015	5.2
85-89	0.23262	0.73541	4205	3092	13293	16535	3.9
90-94	0.32390	0.82137	1113	914	2821	3242	2.9
95-99	0.44023	0.86632	199	172	391	421	2.1
100+	0.88600	1.00000	27	27	30	30	1.1